Francesco Passaro enters this Todi Challenger first-round match on outdoor red clay as the clear favorite against lower-ranked Italian qualifier Carlo Alberto Caniato. Passaro, a former top-100 player with a career-high ATP ranking of 89, brings greater experience and recent main-tour exposure despite a modest 1-3 record in 2026. Caniato, ranked outside the top 350, has limited ATP-level results and faces a significant step up in competition on his home-soil Challenger debut at this level. No prior head-to-head exists, and the surface favors baseline consistency where Passaro’s experience typically provides an edge in early-round encounters. Weather conditions appear stable, with no reported injuries affecting either player.
基於Polymarket數據的AI實驗性摘要。這不是交易建議，也不影響該市場的結算方式。 · 更新於This market refers to the tennis match between Carlo Alberto Caniato and Francesco Passaro in the Todi, originally scheduled for August 11, 2026 at 2:30PM ET.
This market will resolve to 'Carlo Alberto Caniato' if Carlo Alberto Caniato advances against Francesco Passaro.
This market will resolve to 'Francesco Passaro' if Francesco Passaro advances against Carlo Alberto Caniato.
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 Carlo Alberto Caniato and Francesco Passaro in the Todi, originally scheduled for August 11, 2026 at 2:30PM 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 Carlo Alberto Caniato and Francesco Passaro in the Todi, originally scheduled for August 11, 2026 at 2:30PM ET.
This market will resolve to “Caniato” if Carlo Alberto Caniato wins the first set. It will resolve to “Passaro” if Francesco Passaro 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 Carlo Alberto Caniato and Francesco Passaro in the Todi, originally scheduled for August 11, 2026 at 2:30PM 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 Carlo Alberto Caniato and Francesco Passaro in the Todi, originally scheduled for August 11, 2026 at 2:30PM ET.
This market will resolve to “Caniato” if Carlo Alberto Caniato wins set 2. It will resolve to “Passaro” if Francesco Passaro 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 Carlo Alberto Caniato and Francesco Passaro in the Todi, originally scheduled for August 11, 2026 at 2:30PM 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 Carlo Alberto Caniato and Francesco Passaro in the Todi, originally scheduled for August 11, 2026 at 2:30PM ET.
This market will resolve to "Caniato" if Carlo Alberto Caniato wins by 2 or more sets than Francesco Passaro, based on the final completed score. Otherwise, it will resolve to "Passaro."
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 Francesco Passaro and Carlo Alberto Caniato in the Todi, originally scheduled for August 11, 2026 at 2:30PM ET.
This market will resolve to "Passaro" if Francesco Passaro wins by 2 or more sets than Carlo Alberto Caniato, based on the final completed score. Otherwise, it will resolve to "Caniato."
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 Carlo Alberto Caniato and Francesco Passaro in the Todi, originally scheduled for August 11, 2026 at 2:30PM 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 Carlo Alberto Caniato and Francesco Passaro in the Todi, originally scheduled for August 11, 2026 at 2:30PM 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 Carlo Alberto Caniato and Francesco Passaro in the Todi, originally scheduled for August 11, 2026 at 2:30PM 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 Carlo Alberto Caniato and Francesco Passaro in the Todi, originally scheduled for August 11, 2026 at 2:30PM 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 Carlo Alberto Caniato and Francesco Passaro in the Todi, originally scheduled for August 11, 2026 at 2:30PM 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 Carlo Alberto Caniato and Francesco Passaro in the Todi, originally scheduled for August 11, 2026 at 2:30PM 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 Carlo Alberto Caniato and Francesco Passaro in the Todi, originally scheduled for August 11, 2026 at 2:30PM 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.This market refers to the tennis match between Carlo Alberto Caniato and Francesco Passaro in the Todi, originally scheduled for August 11, 2026 at 2:30PM 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.Francesco Passaro enters this Todi Challenger first-round match on outdoor red clay as the clear favorite against lower-ranked Italian qualifier Carlo Alberto Caniato. Passaro, a former top-100 player with a career-high ATP ranking of 89, brings greater experience and recent main-tour exposure despite a modest 1-3 record in 2026. Caniato, ranked outside the top 350, has limited ATP-level results and faces a significant step up in competition on his home-soil Challenger debut at this level. No prior head-to-head exists, and the surface favors baseline consistency where Passaro’s experience typically provides an edge in early-round encounters. Weather conditions appear stable, with no reported injuries affecting either player.
This market refers to the tennis match between Carlo Alberto Caniato and Francesco Passaro in the Todi, originally scheduled for August 11, 2026 at 2:30PM ET.
This market will resolve to 'Carlo Alberto Caniato' if Carlo Alberto Caniato advances against Francesco Passaro.
This market will resolve to 'Francesco Passaro' if Francesco Passaro advances against Carlo Alberto Caniato.
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 will resolve to 'Carlo Alberto Caniato' if Carlo Alberto Caniato advances against Francesco Passaro.
This market will resolve to 'Francesco Passaro' if Francesco Passaro advances against Carlo Alberto Caniato.
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.
市場開放時間： Aug 10, 2026, 12:00 PM ET
交易量
$244,969結束日期
2026-08-18市場開放時間
Aug 10, 2026, 12:00 PM ETThis market refers to the tennis match between Carlo Alberto Caniato and Francesco Passaro in the Todi, originally scheduled for August 11, 2026 at 2:30PM ET.
This market will resolve to 'Carlo Alberto Caniato' if Carlo Alberto Caniato advances against Francesco Passaro.
This market will resolve to 'Francesco Passaro' if Francesco Passaro advances against Carlo Alberto Caniato.
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 Carlo Alberto Caniato and Francesco Passaro in the Todi, originally scheduled for August 11, 2026 at 2:30PM 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 Carlo Alberto Caniato and Francesco Passaro in the Todi, originally scheduled for August 11, 2026 at 2:30PM ET.
This market will resolve to “Caniato” if Carlo Alberto Caniato wins the first set. It will resolve to “Passaro” if Francesco Passaro 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 Carlo Alberto Caniato and Francesco Passaro in the Todi, originally scheduled for August 11, 2026 at 2:30PM 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 Carlo Alberto Caniato and Francesco Passaro in the Todi, originally scheduled for August 11, 2026 at 2:30PM ET.
This market will resolve to “Caniato” if Carlo Alberto Caniato wins set 2. It will resolve to “Passaro” if Francesco Passaro 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 Carlo Alberto Caniato and Francesco Passaro in the Todi, originally scheduled for August 11, 2026 at 2:30PM 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 Carlo Alberto Caniato and Francesco Passaro in the Todi, originally scheduled for August 11, 2026 at 2:30PM ET.
This market will resolve to "Caniato" if Carlo Alberto Caniato wins by 2 or more sets than Francesco Passaro, based on the final completed score. Otherwise, it will resolve to "Passaro."
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 Francesco Passaro and Carlo Alberto Caniato in the Todi, originally scheduled for August 11, 2026 at 2:30PM ET.
This market will resolve to "Passaro" if Francesco Passaro wins by 2 or more sets than Carlo Alberto Caniato, based on the final completed score. Otherwise, it will resolve to "Caniato."
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 Carlo Alberto Caniato and Francesco Passaro in the Todi, originally scheduled for August 11, 2026 at 2:30PM 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 Carlo Alberto Caniato and Francesco Passaro in the Todi, originally scheduled for August 11, 2026 at 2:30PM 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 Carlo Alberto Caniato and Francesco Passaro in the Todi, originally scheduled for August 11, 2026 at 2:30PM 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 Carlo Alberto Caniato and Francesco Passaro in the Todi, originally scheduled for August 11, 2026 at 2:30PM 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 Carlo Alberto Caniato and Francesco Passaro in the Todi, originally scheduled for August 11, 2026 at 2:30PM 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 Carlo Alberto Caniato and Francesco Passaro in the Todi, originally scheduled for August 11, 2026 at 2:30PM 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 Carlo Alberto Caniato and Francesco Passaro in the Todi, originally scheduled for August 11, 2026 at 2:30PM 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.This market refers to the tennis match between Carlo Alberto Caniato and Francesco Passaro in the Todi, originally scheduled for August 11, 2026 at 2:30PM 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.Francesco Passaro enters this Todi Challenger first-round match on outdoor red clay as the clear favorite against lower-ranked Italian qualifier Carlo Alberto Caniato. Passaro, a former top-100 player with a career-high ATP ranking of 89, brings greater experience and recent main-tour exposure despite a modest 1-3 record in 2026. Caniato, ranked outside the top 350, has limited ATP-level results and faces a significant step up in competition on his home-soil Challenger debut at this level. No prior head-to-head exists, and the surface favors baseline consistency where Passaro’s experience typically provides an edge in early-round encounters. Weather conditions appear stable, with no reported injuries affecting either player.
This market refers to the tennis match between Carlo Alberto Caniato and Francesco Passaro in the Todi, originally scheduled for August 11, 2026 at 2:30PM ET.
This market will resolve to 'Carlo Alberto Caniato' if Carlo Alberto Caniato advances against Francesco Passaro.
This market will resolve to 'Francesco Passaro' if Francesco Passaro advances against Carlo Alberto Caniato.
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 will resolve to 'Carlo Alberto Caniato' if Carlo Alberto Caniato advances against Francesco Passaro.
This market will resolve to 'Francesco Passaro' if Francesco Passaro advances against Carlo Alberto Caniato.
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.
市場開放時間： Aug 10, 2026, 12:00 PM ET
交易量
$244,969結束日期
2026-08-18市場開放時間
Aug 10, 2026, 12:00 PM ETFrancesco Passaro enters this Todi Challenger first-round match on outdoor red clay as the clear favorite against lower-ranked Italian qualifier Carlo Alberto Caniato. Passaro, a former top-100 player with a career-high ATP ranking of 89, brings greater experience and recent main-tour exposure despite a modest 1-3 record in 2026. Caniato, ranked outside the top 350, has limited ATP-level results and faces a significant step up in competition on his home-soil Challenger debut at this level. No prior head-to-head exists, and the surface favors baseline consistency where Passaro’s experience typically provides an edge in early-round encounters. Weather conditions appear stable, with no reported injuries affecting either player.
基於Polymarket數據的AI實驗性摘要。這不是交易建議，也不影響該市場的結算方式。 · 更新於
警惕外部連結哦。
警惕外部連結哦。
Frequently Asked Questions