Marta Kostyuk enters the National Bank Open second round as the clear favorite against Canadian qualifier Katherine Sebov, backed by her No. 11 ranking and dominant 2026 results that include WTA 1000 Madrid and Rouen titles plus a Wimbledon semifinal. Kostyuk’s consistent baseline aggression and recent hard-court readiness contrast with Sebov’s No. 231 ranking and limited WTA-level experience. Sebov earned a first-round win over Aoi Ito on home hard courts, where crowd support and familiarity with Toronto conditions offer minor uplift, yet historical patterns show large ranking gaps rarely close in early WTA 1000 rounds without major upsets. No prior head-to-head exists, leaving surface transition and physical freshness as the decisive variables for traders assessing implied probabilities.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedAll Sports
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Marta Kostyuk – Katherine Sebov
Moneyline
$464 Vol.
This market will resolve to 'Marta Kostyuk' if Marta Kostyuk advances against Katherine Sebov.
This market will resolve to 'Katherine Sebov' if Katherine Sebov advances against Marta Kostyuk.
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 WTA Tour. A consensus of credible reporting may also be used.
Market Opened: Aug 3, 2026, 6:00 PM ET
Resolution Source
https://www.wtatennis.com/scoresResolver
0x65070BE91...Marta Kostyuk – Katherine Sebov
Moneyline
$464 Vol.
This market will resolve to 'Marta Kostyuk' if Marta Kostyuk advances against Katherine Sebov.
This market will resolve to 'Katherine Sebov' if Katherine Sebov advances against Marta Kostyuk.
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 WTA Tour. A consensus of credible reporting may also be used.
Market Opened: Aug 3, 2026, 6:00 PM ET
Resolution Source
https://www.wtatennis.com/scoresResolver
0x65070BE91...Marta Kostyuk enters the National Bank Open second round as the clear favorite against Canadian qualifier Katherine Sebov, backed by her No. 11 ranking and dominant 2026 results that include WTA 1000 Madrid and Rouen titles plus a Wimbledon semifinal. Kostyuk’s consistent baseline aggression and recent hard-court readiness contrast with Sebov’s No. 231 ranking and limited WTA-level experience. Sebov earned a first-round win over Aoi Ito on home hard courts, where crowd support and familiarity with Toronto conditions offer minor uplift, yet historical patterns show large ranking gaps rarely close in early WTA 1000 rounds without major upsets. No prior head-to-head exists, leaving surface transition and physical freshness as the decisive variables for traders assessing implied probabilities.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedBeware of external links.
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