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Sports·ATP Tour

Quinn Vandecasteele – Abedallah Shelbayh

9h 30m 53s
Polymarket
Aug 13·2:00 PM
Q. VandecasteeleQ. Vandecasteele
-
A. ShelbayhA. Shelbayh
-
$4.02K Vol.Polymarket
NEW

Moneyline

$4.0K Vol.

This market refers to the tennis match between Quinn Vandecasteele and Abedallah Shelbayh in the Brownsburg, originally scheduled for August 11, 2026 at 4:30PM ET. This market will resolve to 'Quinn Vandecasteele' if Quinn Vandecasteele advances against Abedallah Shelbayh. This market will resolve to 'Abedallah Shelbayh' if Abedallah Shelbayh advances against Quinn Vandecasteele. If the match is canceled (not played at all), ends in a tie, or is delayed beyond 7 days from the scheduled date without a winner determined, this market will resolve to 50-50. If the match begins but is not completed, and one player advances due to the opponent's retirement, default, or disqualification, this market will resolve to the player who advances. If the match ends in a walkover (player withdraws before the start and the other advances automatically), this market will resolve to 50-50. The primary resolution source will be official information from the ATP Tour. A consensus of credible reporting may also be used.This market refers to the tennis match between Quinn Vandecasteele and Abedallah Shelbayh in the Brownsburg, originally scheduled for August 11, 2026 at 4:30PM ET. This market will resolve to "Yes" if all games and sets required to determine a match winner under governing body or event organizer rules are played to completion through normal play. Otherwise, if the match is not completed for any reason, it will resolve to "No." If a forfeit of any kind occurs, including but not limited to a walkover or retirement, this market will resolve "No." If the match is canceled (not played at all), ends in a tie, or is delayed beyond 7 days from the scheduled date without a winner determined, this market will resolve to "No." The primary resolution source for this market is the official statistics of the event as recognized by the governing body or event organizers. However, if the governing body or event organizers have not published final match statistics within 2 hours after the event's conclusion, a consensus of credible reporting may be used instead.This market refers to the tennis match between Quinn Vandecasteele and Abedallah Shelbayh in the Brownsburg, originally scheduled for August 11, 2026 at 4:30PM ET. This market will resolve to “Vandecasteele” if Quinn Vandecasteele wins set 2. It will resolve to “Shelbayh” if Abedallah Shelbayh wins set 2. If the match begins but set 2 is not completed with a winner determined (including the match ending before set 2 is reached), this market will resolve 50-50. If the match is canceled (not played at all) or is delayed beyond 7 days from the scheduled date without play beginning, this market will resolve 50-50. Resolution will be based on official Challenger match statistics.This market refers to the tennis match between Quinn Vandecasteele and Abedallah Shelbayh in the Brownsburg, originally scheduled for August 11, 2026 at 4:30PM ET. This market will resolve to "Vandecasteele" if Quinn Vandecasteele wins by 2 or more sets than Abedallah Shelbayh, based on the final completed score. Otherwise, it will resolve to "Shelbayh." If the match begins but is not completed, this market will resolve 50-50. If the match is canceled before play begins or delayed beyond 7 days from the scheduled date without a result, this market will also resolve 50-50. Resolution will be based on official Challenger results.This market refers to the tennis match between Quinn Vandecasteele and Abedallah Shelbayh in the Brownsburg, originally scheduled for August 11, 2026 at 4:30PM ET. This market will resolve to "Over" if the total number of sets completed equals or exceeds 3. Otherwise, it will resolve to "Under." A super tie breaker is considered as one (1) set for total set markets. If the match begins but is not completed, this market will resolve 50-50. If the match is canceled before play begins or delayed beyond 7 days from the scheduled date without a result, this market will also resolve 50-50. Resolution will be based on official Challenger statistics.This market refers to the tennis match between Quinn Vandecasteele and Abedallah Shelbayh in the Brownsburg, originally scheduled for August 11, 2026 at 4:30PM ET. This market will resolve to “Vandecasteele” if Quinn Vandecasteele wins the first set. It will resolve to “Shelbayh” if Abedallah Shelbayh wins the first set. If the match begins but is not completed, and the first set is concluded with a winner determined, this market will resolve based on that completed set. If the first set is not completed for any reason, this market will resolve 50-50. If the match is canceled (not played at all) or is delayed beyond 7 days from the scheduled date without play beginning, this market will resolve 50-50. Resolution will be based on official Challenger match statistics.This market refers to the tennis match between Quinn Vandecasteele and Abedallah Shelbayh in the Brownsburg, originally scheduled for August 11, 2026 at 4:30PM ET. This market will resolve to "Over" if the total number of games completed across all sets equals or exceeds 22. Otherwise, it will resolve to "Under." All tiebreaks—including any Champions/Super tiebreak—count as one (1) game toward the total. If the match begins but is not completed, this market will resolve 50-50. If the match is canceled before play begins or delayed beyond 7 days from the scheduled date without a result, this market will also resolve 50-50. Resolution will be based on official Challenger statistics.This market refers to the tennis match between Abedallah Shelbayh and Quinn Vandecasteele in the Brownsburg, originally scheduled for August 11, 2026 at 4:30PM ET. This market will resolve to "Shelbayh" if Abedallah Shelbayh wins by 2 or more sets than Quinn Vandecasteele, based on the final completed score. Otherwise, it will resolve to "Vandecasteele." If the match begins but is not completed, this market will resolve 50-50. If the match is canceled before play begins or delayed beyond 7 days from the scheduled date without a result, this market will also resolve 50-50. Resolution will be based on official Challenger results.This market refers to the tennis match between Quinn Vandecasteele and Abedallah Shelbayh in the Brownsburg, originally scheduled for August 11, 2026 at 4:30PM ET. This market will resolve to "Over" if the total number of games completed across all sets equals or exceeds 23. Otherwise, it will resolve to "Under." All tiebreaks—including any Champions/Super tiebreak—count as one (1) game toward the total. If the match begins but is not completed, this market will resolve 50-50. If the match is canceled before play begins or delayed beyond 7 days from the scheduled date without a result, this market will also resolve 50-50. Resolution will be based on official Challenger statistics.This market refers to the tennis match between Quinn Vandecasteele and Abedallah Shelbayh in the Brownsburg, originally scheduled for August 11, 2026 at 4:30PM ET. This market will resolve to "Over" if the total number of games completed across all sets equals or exceeds 24. Otherwise, it will resolve to "Under." All tiebreaks—including any Champions/Super tiebreak—count as one (1) game toward the total. If the match begins but is not completed, this market will resolve 50-50. If the match is canceled before play begins or delayed beyond 7 days from the scheduled date without a result, this market will also resolve 50-50. Resolution will be based on official Challenger statistics.This market refers to the tennis match between Quinn Vandecasteele and Abedallah Shelbayh in the Brownsburg, originally scheduled for August 11, 2026 at 4:30PM ET. This market will resolve to "Over" if the total number of games completed in the first set equals or exceeds 9. Otherwise, it will resolve to "Under." Any first-set tiebreak counts as one (1) game toward the total. If the first set is not completed for any reason, this market will resolve 50-50. If the match is canceled before play begins, or delayed beyond 7 days without commencement, this market will also resolve 50-50. Resolution will be based on official Challenger results.This market refers to the tennis match between Quinn Vandecasteele and Abedallah Shelbayh in the Brownsburg, originally scheduled for August 11, 2026 at 4:30PM ET. This market will resolve to "Over" if the total number of games completed in set 2 equals or exceeds 9. Otherwise, it will resolve to "Under." Any tiebreak in set 2 counts as one (1) game toward the total. If set 2 is not completed for any reason (including the match ending before set 2 is reached), this market will resolve 50-50. If the match is canceled before play begins, or delayed beyond 7 days without commencement, this market will also resolve 50-50. Resolution will be based on official Challenger results.This market refers to the tennis match between Quinn Vandecasteele and Abedallah Shelbayh in the Brownsburg, originally scheduled for August 11, 2026 at 4:30PM ET. This market will resolve to "Over" if the total number of games completed in the first set equals or exceeds 10. Otherwise, it will resolve to "Under." Any first-set tiebreak counts as one (1) game toward the total. If the first set is not completed for any reason, this market will resolve 50-50. If the match is canceled before play begins, or delayed beyond 7 days without commencement, this market will also resolve 50-50. Resolution will be based on official Challenger results.This market refers to the tennis match between Quinn Vandecasteele and Abedallah Shelbayh in the Brownsburg, originally scheduled for August 11, 2026 at 4:30PM ET. This market will resolve to "Over" if the total number of games completed in the first set equals or exceeds 11. Otherwise, it will resolve to "Under." Any first-set tiebreak counts as one (1) game toward the total. If the first set is not completed for any reason, this market will resolve 50-50. If the match is canceled before play begins, or delayed beyond 7 days without commencement, this market will also resolve 50-50. Resolution will be based on official Challenger results.This market refers to the tennis match between Quinn Vandecasteele and Abedallah Shelbayh in the Brownsburg, originally scheduled for August 11, 2026 at 4:30PM ET. This market will resolve to "Over" if the total number of games completed in set 2 equals or exceeds 10. Otherwise, it will resolve to "Under." Any tiebreak in set 2 counts as one (1) game toward the total. If set 2 is not completed for any reason (including the match ending before set 2 is reached), this market will resolve 50-50. If the match is canceled before play begins, or delayed beyond 7 days without commencement, this market will also resolve 50-50. Resolution will be based on official Challenger results.This market refers to the tennis match between Quinn Vandecasteele and Abedallah Shelbayh in the Brownsburg, originally scheduled for August 11, 2026 at 4:30PM ET. This market will resolve to "Over" if the total number of games completed in set 2 equals or exceeds 11. Otherwise, it will resolve to "Under." Any tiebreak in set 2 counts as one (1) game toward the total. If set 2 is not completed for any reason (including the match ending before set 2 is reached), this market will resolve 50-50. If the match is canceled before play begins, or delayed beyond 7 days without commencement, this market will also resolve 50-50. Resolution will be based on official Challenger results.Shelbayh enters this ATP Challenger first-round match on outdoor hard courts in Brownsburg as the clear favorite, with trader consensus reflecting his higher ranking near No. 267 and stronger recent results, including a straight-sets win in Lexington. The 22-year-old Jordanian brings greater professional experience and a career-high ranking of 181 compared with the 23-year-old American Vandecasteele, ranked around No. 471 after transitioning from college tennis at Oregon. Vandecasteele secured a local qualifying or early-round victory but faces a notable stylistic and depth gap on a surface that favors consistent baseline play and serve effectiveness. No prior head-to-head exists, leaving recent form, ranking trajectory, and physical conditioning as the primary drivers of implied probabilities in this matchup.

This market refers to the tennis match between Quinn Vandecasteele and Abedallah Shelbayh in the Brownsburg, originally scheduled for August 11, 2026 at 4:30PM ET.

This market will resolve to 'Quinn Vandecasteele' if Quinn Vandecasteele advances against Abedallah Shelbayh.

This market will resolve to 'Abedallah Shelbayh' if Abedallah Shelbayh advances against Quinn Vandecasteele.

If the match is canceled (not played at all), ends in a tie, or is delayed beyond 7 days from the scheduled date without a winner determined, this market will resolve to 50-50.

If the match begins but is not completed, and one player advances due to the opponent's retirement, default, or disqualification, this market will resolve to the player who advances.

If the match ends in a walkover (player withdraws before the start and the other advances automatically), this market will resolve to 50-50.

The primary resolution source will be official information from the ATP Tour. A consensus of credible reporting may also be used.
Volume
$4,023
End Date
Aug 18, 2026
Market Opened
Aug 11, 2026, 6:00 AM ET

Resolution Source

https://www.atptour.com/en/scores/current

Resolver

0x65070BE91...
This market refers to the tennis match between Quinn Vandecasteele and Abedallah Shelbayh in the Brownsburg, originally scheduled for August 11, 2026 at 4:30PM ET. This market will resolve to 'Quinn Vandecasteele' if Quinn Vandecasteele advances against Abedallah Shelbayh. This market will resolve to 'Abedallah Shelbayh' if Abedallah Shelbayh advances against Quinn Vandecasteele. If the match is canceled (not played at all), ends in a tie, or is delayed beyond 7 days from the scheduled date without a winner determined, this market will resolve to 50-50. If the match begins but is not completed, and one player advances due to the opponent's retirement, default, or disqualification, this market will resolve to the player who advances. If the match ends in a walkover (player withdraws before the start and the other advances automatically), this market will resolve to 50-50. The primary resolution source will be official information from the ATP Tour. A consensus of credible reporting may also be used.

Beware of external links.

Frequently Asked Questions

The “A. Shelbayh vs. Q. Vandecasteele” market on Polymarket lets you trade on the outcome of the ATP Tour game between the Abedallah Shelbayh and the Quinn Vandecasteele, scheduled for August 13, 2026 at 10:00 AM ET. The primary market is the moneyline — which team will win the game — where A. Shelbayh is currently priced at 68¢ (68% implied probability) and Q. Vandecasteele at 32¢ (32%). Beyond the moneyline, sports markets on Polymarket may feature spreads, totals (over/under), and player props, giving you multiple ways to trade on this game. Prices reflect real-time crowd-sourced probabilities. Shares in the correct outcome pay out $1 each when the market resolves after the game ends.

As of now, the “A. Shelbayh vs. Q. Vandecasteele” market has generated $4K in total trading volume across all market types (moneyline, spreads, totals, and player props). This volume reflects active engagement from the Polymarket trading community, and a deeper pool of traders generally means more informative, reliable odds. You can track live price movements and trade on any market directly on this page.

To trade on “A. Shelbayh vs. Q. Vandecasteele,” start by choosing the market type you want to trade: Moneyline (which team wins), Spreads (margin of victory), Totals (combined score over/under), or Player Props (individual player stat lines). Each market shows the current price for each side — for example, the moneyline shows SHELBAY at 68¢ and VANDECA at 32¢. Select the side you want to trade, choose Buy to take a position or Sell to close an existing one, enter your amount, and click Trade. If your chosen side is correct when the game ends and the market resolves, your shares pay out $1 each. If it’s incorrect, they pay out $0. You can also sell your shares at any time before the game ends to lock in a profit or cut a loss.

The current moneyline odds for “A. Shelbayh vs. Q. Vandecasteele” show Abedallah Shelbayh at 68¢ (68% implied probability) and Quinn Vandecasteele at 32¢ (32%). All odds update in real-time as traders buy and sell shares, reflecting the latest collective view of how this game will play out. Check back frequently or bookmark this page to follow how the odds shift as game time approaches.

The “A. Shelbayh vs. Q. Vandecasteele” market resolves based on the official final score of the ATP Tour game as reported by ATP Tour’s official results, including overtime if applicable. Moneyline markets resolve to the team that wins the game. Spread markets resolve based on the final margin of victory relative to the posted line. Totals (over/under) markets resolve based on the combined final score of both teams. Player prop markets resolve based on official box score statistics. If the game is postponed or canceled, the market resolution rules (available in the Rules section on this page) specify how that scenario is handled. We recommend reviewing the full resolution criteria before trading.
Sports·ATP Tour

Quinn Vandecasteele – Abedallah Shelbayh

9h 30m 53s
Polymarket
Aug 13·2:00 PM
Q. VandecasteeleQ. Vandecasteele
-
A. ShelbayhA. Shelbayh
-
$4.02K Vol.Polymarket
NEW

Moneyline

$4.0K Vol.

This market refers to the tennis match between Quinn Vandecasteele and Abedallah Shelbayh in the Brownsburg, originally scheduled for August 11, 2026 at 4:30PM ET. This market will resolve to 'Quinn Vandecasteele' if Quinn Vandecasteele advances against Abedallah Shelbayh. This market will resolve to 'Abedallah Shelbayh' if Abedallah Shelbayh advances against Quinn Vandecasteele. If the match is canceled (not played at all), ends in a tie, or is delayed beyond 7 days from the scheduled date without a winner determined, this market will resolve to 50-50. If the match begins but is not completed, and one player advances due to the opponent's retirement, default, or disqualification, this market will resolve to the player who advances. If the match ends in a walkover (player withdraws before the start and the other advances automatically), this market will resolve to 50-50. The primary resolution source will be official information from the ATP Tour. A consensus of credible reporting may also be used.This market refers to the tennis match between Quinn Vandecasteele and Abedallah Shelbayh in the Brownsburg, originally scheduled for August 11, 2026 at 4:30PM ET. This market will resolve to "Yes" if all games and sets required to determine a match winner under governing body or event organizer rules are played to completion through normal play. Otherwise, if the match is not completed for any reason, it will resolve to "No." If a forfeit of any kind occurs, including but not limited to a walkover or retirement, this market will resolve "No." If the match is canceled (not played at all), ends in a tie, or is delayed beyond 7 days from the scheduled date without a winner determined, this market will resolve to "No." The primary resolution source for this market is the official statistics of the event as recognized by the governing body or event organizers. However, if the governing body or event organizers have not published final match statistics within 2 hours after the event's conclusion, a consensus of credible reporting may be used instead.This market refers to the tennis match between Quinn Vandecasteele and Abedallah Shelbayh in the Brownsburg, originally scheduled for August 11, 2026 at 4:30PM ET. This market will resolve to “Vandecasteele” if Quinn Vandecasteele wins set 2. It will resolve to “Shelbayh” if Abedallah Shelbayh wins set 2. If the match begins but set 2 is not completed with a winner determined (including the match ending before set 2 is reached), this market will resolve 50-50. If the match is canceled (not played at all) or is delayed beyond 7 days from the scheduled date without play beginning, this market will resolve 50-50. Resolution will be based on official Challenger match statistics.This market refers to the tennis match between Quinn Vandecasteele and Abedallah Shelbayh in the Brownsburg, originally scheduled for August 11, 2026 at 4:30PM ET. This market will resolve to "Vandecasteele" if Quinn Vandecasteele wins by 2 or more sets than Abedallah Shelbayh, based on the final completed score. Otherwise, it will resolve to "Shelbayh." If the match begins but is not completed, this market will resolve 50-50. If the match is canceled before play begins or delayed beyond 7 days from the scheduled date without a result, this market will also resolve 50-50. Resolution will be based on official Challenger results.This market refers to the tennis match between Quinn Vandecasteele and Abedallah Shelbayh in the Brownsburg, originally scheduled for August 11, 2026 at 4:30PM ET. This market will resolve to "Over" if the total number of sets completed equals or exceeds 3. Otherwise, it will resolve to "Under." A super tie breaker is considered as one (1) set for total set markets. If the match begins but is not completed, this market will resolve 50-50. If the match is canceled before play begins or delayed beyond 7 days from the scheduled date without a result, this market will also resolve 50-50. Resolution will be based on official Challenger statistics.This market refers to the tennis match between Quinn Vandecasteele and Abedallah Shelbayh in the Brownsburg, originally scheduled for August 11, 2026 at 4:30PM ET. This market will resolve to “Vandecasteele” if Quinn Vandecasteele wins the first set. It will resolve to “Shelbayh” if Abedallah Shelbayh wins the first set. If the match begins but is not completed, and the first set is concluded with a winner determined, this market will resolve based on that completed set. If the first set is not completed for any reason, this market will resolve 50-50. If the match is canceled (not played at all) or is delayed beyond 7 days from the scheduled date without play beginning, this market will resolve 50-50. Resolution will be based on official Challenger match statistics.This market refers to the tennis match between Quinn Vandecasteele and Abedallah Shelbayh in the Brownsburg, originally scheduled for August 11, 2026 at 4:30PM ET. This market will resolve to "Over" if the total number of games completed across all sets equals or exceeds 22. Otherwise, it will resolve to "Under." All tiebreaks—including any Champions/Super tiebreak—count as one (1) game toward the total. If the match begins but is not completed, this market will resolve 50-50. If the match is canceled before play begins or delayed beyond 7 days from the scheduled date without a result, this market will also resolve 50-50. Resolution will be based on official Challenger statistics.This market refers to the tennis match between Abedallah Shelbayh and Quinn Vandecasteele in the Brownsburg, originally scheduled for August 11, 2026 at 4:30PM ET. This market will resolve to "Shelbayh" if Abedallah Shelbayh wins by 2 or more sets than Quinn Vandecasteele, based on the final completed score. Otherwise, it will resolve to "Vandecasteele." If the match begins but is not completed, this market will resolve 50-50. If the match is canceled before play begins or delayed beyond 7 days from the scheduled date without a result, this market will also resolve 50-50. Resolution will be based on official Challenger results.This market refers to the tennis match between Quinn Vandecasteele and Abedallah Shelbayh in the Brownsburg, originally scheduled for August 11, 2026 at 4:30PM ET. This market will resolve to "Over" if the total number of games completed across all sets equals or exceeds 23. Otherwise, it will resolve to "Under." All tiebreaks—including any Champions/Super tiebreak—count as one (1) game toward the total. If the match begins but is not completed, this market will resolve 50-50. If the match is canceled before play begins or delayed beyond 7 days from the scheduled date without a result, this market will also resolve 50-50. Resolution will be based on official Challenger statistics.This market refers to the tennis match between Quinn Vandecasteele and Abedallah Shelbayh in the Brownsburg, originally scheduled for August 11, 2026 at 4:30PM ET. This market will resolve to "Over" if the total number of games completed across all sets equals or exceeds 24. Otherwise, it will resolve to "Under." All tiebreaks—including any Champions/Super tiebreak—count as one (1) game toward the total. If the match begins but is not completed, this market will resolve 50-50. If the match is canceled before play begins or delayed beyond 7 days from the scheduled date without a result, this market will also resolve 50-50. Resolution will be based on official Challenger statistics.This market refers to the tennis match between Quinn Vandecasteele and Abedallah Shelbayh in the Brownsburg, originally scheduled for August 11, 2026 at 4:30PM ET. This market will resolve to "Over" if the total number of games completed in the first set equals or exceeds 9. Otherwise, it will resolve to "Under." Any first-set tiebreak counts as one (1) game toward the total. If the first set is not completed for any reason, this market will resolve 50-50. If the match is canceled before play begins, or delayed beyond 7 days without commencement, this market will also resolve 50-50. Resolution will be based on official Challenger results.This market refers to the tennis match between Quinn Vandecasteele and Abedallah Shelbayh in the Brownsburg, originally scheduled for August 11, 2026 at 4:30PM ET. This market will resolve to "Over" if the total number of games completed in set 2 equals or exceeds 9. Otherwise, it will resolve to "Under." Any tiebreak in set 2 counts as one (1) game toward the total. If set 2 is not completed for any reason (including the match ending before set 2 is reached), this market will resolve 50-50. If the match is canceled before play begins, or delayed beyond 7 days without commencement, this market will also resolve 50-50. Resolution will be based on official Challenger results.This market refers to the tennis match between Quinn Vandecasteele and Abedallah Shelbayh in the Brownsburg, originally scheduled for August 11, 2026 at 4:30PM ET. This market will resolve to "Over" if the total number of games completed in the first set equals or exceeds 10. Otherwise, it will resolve to "Under." Any first-set tiebreak counts as one (1) game toward the total. If the first set is not completed for any reason, this market will resolve 50-50. If the match is canceled before play begins, or delayed beyond 7 days without commencement, this market will also resolve 50-50. Resolution will be based on official Challenger results.This market refers to the tennis match between Quinn Vandecasteele and Abedallah Shelbayh in the Brownsburg, originally scheduled for August 11, 2026 at 4:30PM ET. This market will resolve to "Over" if the total number of games completed in the first set equals or exceeds 11. Otherwise, it will resolve to "Under." Any first-set tiebreak counts as one (1) game toward the total. If the first set is not completed for any reason, this market will resolve 50-50. If the match is canceled before play begins, or delayed beyond 7 days without commencement, this market will also resolve 50-50. Resolution will be based on official Challenger results.This market refers to the tennis match between Quinn Vandecasteele and Abedallah Shelbayh in the Brownsburg, originally scheduled for August 11, 2026 at 4:30PM ET. This market will resolve to "Over" if the total number of games completed in set 2 equals or exceeds 10. Otherwise, it will resolve to "Under." Any tiebreak in set 2 counts as one (1) game toward the total. If set 2 is not completed for any reason (including the match ending before set 2 is reached), this market will resolve 50-50. If the match is canceled before play begins, or delayed beyond 7 days without commencement, this market will also resolve 50-50. Resolution will be based on official Challenger results.This market refers to the tennis match between Quinn Vandecasteele and Abedallah Shelbayh in the Brownsburg, originally scheduled for August 11, 2026 at 4:30PM ET. This market will resolve to "Over" if the total number of games completed in set 2 equals or exceeds 11. Otherwise, it will resolve to "Under." Any tiebreak in set 2 counts as one (1) game toward the total. If set 2 is not completed for any reason (including the match ending before set 2 is reached), this market will resolve 50-50. If the match is canceled before play begins, or delayed beyond 7 days without commencement, this market will also resolve 50-50. Resolution will be based on official Challenger results.Shelbayh enters this ATP Challenger first-round match on outdoor hard courts in Brownsburg as the clear favorite, with trader consensus reflecting his higher ranking near No. 267 and stronger recent results, including a straight-sets win in Lexington. The 22-year-old Jordanian brings greater professional experience and a career-high ranking of 181 compared with the 23-year-old American Vandecasteele, ranked around No. 471 after transitioning from college tennis at Oregon. Vandecasteele secured a local qualifying or early-round victory but faces a notable stylistic and depth gap on a surface that favors consistent baseline play and serve effectiveness. No prior head-to-head exists, leaving recent form, ranking trajectory, and physical conditioning as the primary drivers of implied probabilities in this matchup.

This market refers to the tennis match between Quinn Vandecasteele and Abedallah Shelbayh in the Brownsburg, originally scheduled for August 11, 2026 at 4:30PM ET.

This market will resolve to 'Quinn Vandecasteele' if Quinn Vandecasteele advances against Abedallah Shelbayh.

This market will resolve to 'Abedallah Shelbayh' if Abedallah Shelbayh advances against Quinn Vandecasteele.

If the match is canceled (not played at all), ends in a tie, or is delayed beyond 7 days from the scheduled date without a winner determined, this market will resolve to 50-50.

If the match begins but is not completed, and one player advances due to the opponent's retirement, default, or disqualification, this market will resolve to the player who advances.

If the match ends in a walkover (player withdraws before the start and the other advances automatically), this market will resolve to 50-50.

The primary resolution source will be official information from the ATP Tour. A consensus of credible reporting may also be used.
Volume
$4,023
End Date
Aug 18, 2026
Market Opened
Aug 11, 2026, 6:00 AM ET

Resolution Source

https://www.atptour.com/en/scores/current

Resolver

0x65070BE91...
This market refers to the tennis match between Quinn Vandecasteele and Abedallah Shelbayh in the Brownsburg, originally scheduled for August 11, 2026 at 4:30PM ET. This market will resolve to 'Quinn Vandecasteele' if Quinn Vandecasteele advances against Abedallah Shelbayh. This market will resolve to 'Abedallah Shelbayh' if Abedallah Shelbayh advances against Quinn Vandecasteele. If the match is canceled (not played at all), ends in a tie, or is delayed beyond 7 days from the scheduled date without a winner determined, this market will resolve to 50-50. If the match begins but is not completed, and one player advances due to the opponent's retirement, default, or disqualification, this market will resolve to the player who advances. If the match ends in a walkover (player withdraws before the start and the other advances automatically), this market will resolve to 50-50. The primary resolution source will be official information from the ATP Tour. A consensus of credible reporting may also be used.

Beware of external links.

Frequently Asked Questions

The “A. Shelbayh vs. Q. Vandecasteele” market on Polymarket lets you trade on the outcome of the ATP Tour game between the Abedallah Shelbayh and the Quinn Vandecasteele, scheduled for August 13, 2026 at 10:00 AM ET. The primary market is the moneyline — which team will win the game — where A. Shelbayh is currently priced at 68¢ (68% implied probability) and Q. Vandecasteele at 32¢ (32%). Beyond the moneyline, sports markets on Polymarket may feature spreads, totals (over/under), and player props, giving you multiple ways to trade on this game. Prices reflect real-time crowd-sourced probabilities. Shares in the correct outcome pay out $1 each when the market resolves after the game ends.

As of now, the “A. Shelbayh vs. Q. Vandecasteele” market has generated $4K in total trading volume across all market types (moneyline, spreads, totals, and player props). This volume reflects active engagement from the Polymarket trading community, and a deeper pool of traders generally means more informative, reliable odds. You can track live price movements and trade on any market directly on this page.

To trade on “A. Shelbayh vs. Q. Vandecasteele,” start by choosing the market type you want to trade: Moneyline (which team wins), Spreads (margin of victory), Totals (combined score over/under), or Player Props (individual player stat lines). Each market shows the current price for each side — for example, the moneyline shows SHELBAY at 68¢ and VANDECA at 32¢. Select the side you want to trade, choose Buy to take a position or Sell to close an existing one, enter your amount, and click Trade. If your chosen side is correct when the game ends and the market resolves, your shares pay out $1 each. If it’s incorrect, they pay out $0. You can also sell your shares at any time before the game ends to lock in a profit or cut a loss.

The current moneyline odds for “A. Shelbayh vs. Q. Vandecasteele” show Abedallah Shelbayh at 68¢ (68% implied probability) and Quinn Vandecasteele at 32¢ (32%). All odds update in real-time as traders buy and sell shares, reflecting the latest collective view of how this game will play out. Check back frequently or bookmark this page to follow how the odds shift as game time approaches.

The “A. Shelbayh vs. Q. Vandecasteele” market resolves based on the official final score of the ATP Tour game as reported by ATP Tour’s official results, including overtime if applicable. Moneyline markets resolve to the team that wins the game. Spread markets resolve based on the final margin of victory relative to the posted line. Totals (over/under) markets resolve based on the combined final score of both teams. Player prop markets resolve based on official box score statistics. If the game is postponed or canceled, the market resolution rules (available in the Rules section on this page) specify how that scenario is handled. We recommend reviewing the full resolution criteria before trading.