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Japan Women's Open: Katerina Siniakova vs Peyton Stearns

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Japan Women's Open: Katerina Siniakova vs Peyton Stearns

Japan Women's Open: Katerina Siniakova vs Peyton Stearns
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15

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Market snapshot: Oct 18, 2026, 12:00 AM UTC. Prices may have changed.

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15 markets tracked

Japan Women's Open: Completed Match: Katerina Siniakova vs Peyton Stearns

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All Markets(15)
MarketOutcome price
Japan Women's Open: Completed Match: Katerina Siniakova vs Peyton Stearns
Yes 50.5%
Japan Women's Open: Katerina Siniakova vs Peyton Stearns
Choose outcome Unavailable
Set 1 Winner: Katerina Siniakova vs Peyton Stearns
Choose outcome Unavailable
Set 2 Winner: Katerina Siniakova vs Peyton Stearns
Choose outcome Unavailable
Katerina Siniakova vs. Peyton Stearns: Total Sets Over/Under 2.5
Choose outcome Unavailable

Event Overview

This market refers to the tennis match between Katerina Siniakova and Peyton Stearns in the Japan Women's Open, originally scheduled for October 18, 2026 at 9:00PM ET. This market will resolve to 'Katerina Siniakova' if Katerina Siniakova advances against Peyton Stearns. This market will resolve to 'Peyton Stearns' if Peyton Stearns advances against Katerina Siniakova. If the match is canceled (not played at all), ends in a tie, or a winner has not been determined by November 1, 2026, 11:59 PM ET (14 days after the scheduled start), 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 Resolution Rules

Important Notes

  • Markets resolve based on official data sources specified in the rules
  • Resolution may be delayed if official data is not immediately available
  • Polymarket uses UMA protocol for dispute resolution when necessary
  • Always verify the exact resolution criteria before trading
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Markets (15)

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POLYMARKETSports
Set Handicap: Katerina Siniakova (-1.5) vs Peyton Stearns (+1.5)

Set Handicap: Katerina Siniakova (-1.5) vs Peyton Stearns (+1.5)

This market refers to the tennis match between Katerina Siniakova and Peyton Stearns in the Japan Women's Open, originally scheduled for October 18, 2026 at 9:00PM ET. This market will resolve to "Katerina Siniakova" if Katerina Siniakova wins by 2 or more sets than Peyton Stearns, based on the final completed score. Otherwise, it will resolve to "Peyton Stearns." If the match begins but is not completed due to retirement, default, or disqualification, this market will resolve 50-50, unless the outcome of this market has already been unconditionally determined by the completed portion of play under the match format published by the tournament organizer for that round. For example, if the deciding set has begun when the match ends, Katerina Siniakova can no longer win by 2 or more sets, and this market will resolve to "Peyton Stearns." If the match is canceled before play begins, or a result has not been determined by November 1, 2026, 11:59 PM ET (14 days after the scheduled start), this market will resolve 50-50. Resolution will be based on official WTA results.

LiquidityLOW
Select an outcome on the detail pageUnavailable
Price unavailable
Volume$0
Liquidity$1.2K
End DateOct 26, 2026
View Details
POLYMARKETSports
Katerina Siniakova vs. Peyton Stearns: Total Sets Over/Under 2.5

Katerina Siniakova vs. Peyton Stearns: Total Sets Over/Under 2.5

This market refers to the tennis match between Katerina Siniakova and Peyton Stearns in the Japan Women's Open, originally scheduled for October 18, 2026 at 9:00PM ET. If the match is played to completion, this market will resolve to "Over" if the total number of sets played equals or exceeds 3, and to "Under" otherwise. A set counts as played once it has begun, even if it is not played to completion. A super tie breaker is considered as one (1) set. If the match is postponed or suspended, this market will remain open until the match has been completed. A postponement alone will not trigger a 50-50 resolution. If a player retires, withdraws, is defaulted, or is disqualified, or the match otherwise begins but is not completed, this market will resolve based on any outcome that was already unequivocally determined at the time play stopped. An outcome is considered unequivocally determined if it would have been guaranteed under every possible completion of the match played according to the match format published by the tournament organizer for that round. For example, for a line of 2.5, if play stops with the players at one set each, completing the match would have required at least one additional set, resulting in at least 3 sets played, so "Over" would resolve as the winning outcome. If neither outcome was already determined at the time play stopped, this market will resolve 50-50. If the match is canceled, or has not been completed by November 1, 2026, 11:59 PM ET, this market will resolve 50-50, unless an outcome was already unequivocally determined as described above. The primary resolution source for this market will be official WTA statistics; however, a consensus of credible reporting may also be used.

LiquidityLOW
Select an outcome on the detail pageUnavailable
Price unavailable
Volume$0
Liquidity$101
End DateOct 26, 2026
View Details
POLYMARKETSports
Siniakova vs. Stearns: Match Over/Under 23.5

Siniakova vs. Stearns: Match Over/Under 23.5

This market refers to the tennis match between Katerina Siniakova and Peyton Stearns in the Japan Women's Open, originally scheduled for October 18, 2026 at 9:00PM ET. This market will resolve to "Over" if the total number of games completed equals or exceeds 24. Otherwise, it will resolve to "Under." All tiebreaks, including any Champions/Super tiebreak, count as one (1) game. If the match is postponed or suspended, this market will remain open until the match has been completed. A postponement alone will not trigger a 50-50 resolution. If the match is permanently abandoned before completion, or if the match has not been completed by November 1, 2026, 11:59 PM ET, this market will resolve 50-50, unless the outcome has already been unconditionally determined based on completed play. An outcome is considered unconditionally determined if it would have been guaranteed under every possible completion of the match played according to the match format published by the tournament organizer for that round, including whether a final set is played as a full set or as a match tiebreak. For example, for a line of 21.5, if play stops at 6-3, 5-6, completing the match would have required at least 2 additional games, resulting in at least 22 games played, so "Over" would resolve as the winning outcome. Likewise, if the published format replaces the final set with a match tiebreak, that tiebreak counts as one (1) game, so for a line of 22.5, if play stops at 6-2, 3-3, the match could have reached at most 22 games and "Under" would resolve as the winning outcome. The primary resolution source for this market will be official WTA statistics; however, a consensus of credible reporting may also be used.

LiquidityLOW
Select an outcome on the detail pageUnavailable
Price unavailable
Volume$0
Liquidity$1.3K
End DateOct 26, 2026
View Details
POLYMARKETSports
Siniakova vs. Stearns: Match Over/Under 22.5

Siniakova vs. Stearns: Match Over/Under 22.5

This market refers to the tennis match between Katerina Siniakova and Peyton Stearns in the Japan Women's Open, originally scheduled for October 18, 2026 at 9:00PM ET. This market will resolve to "Over" if the total number of games completed equals or exceeds 23. Otherwise, it will resolve to "Under." All tiebreaks, including any Champions/Super tiebreak, count as one (1) game. If the match is postponed or suspended, this market will remain open until the match has been completed. A postponement alone will not trigger a 50-50 resolution. If the match is permanently abandoned before completion, or if the match has not been completed by November 1, 2026, 11:59 PM ET, this market will resolve 50-50, unless the outcome has already been unconditionally determined based on completed play. An outcome is considered unconditionally determined if it would have been guaranteed under every possible completion of the match played according to the match format published by the tournament organizer for that round, including whether a final set is played as a full set or as a match tiebreak. For example, for a line of 21.5, if play stops at 6-3, 5-6, completing the match would have required at least 2 additional games, resulting in at least 22 games played, so "Over" would resolve as the winning outcome. Likewise, if the published format replaces the final set with a match tiebreak, that tiebreak counts as one (1) game, so for a line of 22.5, if play stops at 6-2, 3-3, the match could have reached at most 22 games and "Under" would resolve as the winning outcome. The primary resolution source for this market will be official WTA statistics; however, a consensus of credible reporting may also be used.

LiquidityLOW
Select an outcome on the detail pageUnavailable
Price unavailable
Volume$0
Liquidity$1.3K
End DateOct 26, 2026
View Details
POLYMARKETSports
Siniakova vs. Stearns: Set 1 Games Over/Under 9.5

Siniakova vs. Stearns: Set 1 Games Over/Under 9.5

This market refers to the tennis match between Katerina Siniakova and Peyton Stearns in the Japan Women's Open, originally scheduled for October 18, 2026 at 9:00PM 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. If the match is postponed or suspended, this market will remain open until the first set has been completed. A postponement alone will not trigger a 50-50 resolution. If the match is permanently abandoned before the first set is completed, or if the first set has not been completed by November 1, 2026, 11:59 PM ET, this market will resolve 50-50, unless the outcome has already been unconditionally determined based on completed play. An outcome is considered unconditionally determined if it would have been guaranteed under every possible completion of the set played according to the match format published by the tournament organizer for that round, including whether the set is decided by a tiebreak. For example, for a line of 9.5, if play stops with the first set at 5-4, completing the set would have required at least 1 additional game, resulting in at least 10 games played, so "Over" would resolve as the winning outcome. The primary resolution source for this market will be official WTA statistics; however, a consensus of credible reporting may also be used. This market may resolve only when the listed period of play has concluded and the result can be definitively determined by the listed resolution source(s).

LiquidityLOW
Select an outcome on the detail pageUnavailable
Price unavailable
Volume$0
Liquidity$48
End DateOct 26, 2026
View Details
POLYMARKETSports
Japan Women's Open: Katerina Siniakova vs Peyton Stearns

Japan Women's Open: Katerina Siniakova vs Peyton Stearns

This market refers to the tennis match between Katerina Siniakova and Peyton Stearns in the Japan Women's Open, originally scheduled for October 18, 2026 at 9:00PM ET. This market will resolve to 'Katerina Siniakova' if Katerina Siniakova advances against Peyton Stearns. This market will resolve to 'Peyton Stearns' if Peyton Stearns advances against Katerina Siniakova. If the match is canceled (not played at all), ends in a tie, or a winner has not been determined by November 1, 2026, 11:59 PM ET (14 days after the scheduled start), 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.

LiquidityLOW
Select an outcome on the detail pageUnavailable
Price unavailable
Volume$0
Liquidity$2.0K
End DateOct 26, 2026
View Details
POLYMARKETSports
Set 1 Winner: Katerina Siniakova vs Peyton Stearns

Set 1 Winner: Katerina Siniakova vs Peyton Stearns

This market refers to the tennis match between Katerina Siniakova and Peyton Stearns in the Japan Women's Open, originally scheduled for October 18, 2026 at 9:00PM ET. This market will resolve to “Katerina Siniakova” if Katerina Siniakova wins the first set. It will resolve to “Peyton Stearns” if Peyton Stearns 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 play has not begun by November 1, 2026, 11:59 PM ET (14 days after the scheduled start), this market will resolve 50-50. Resolution will be based on official WTA match statistics. This market may resolve only when the listed period of play has concluded and the result can be definitively determined by the listed resolution source(s).

LiquidityLOW
Select an outcome on the detail pageUnavailable
Price unavailable
Volume$0
Liquidity$1.6K
End DateOct 26, 2026
View Details
POLYMARKETSports
Set 2 Winner: Katerina Siniakova vs Peyton Stearns

Set 2 Winner: Katerina Siniakova vs Peyton Stearns

This market refers to the tennis match between Katerina Siniakova and Peyton Stearns in the Japan Women's Open, originally scheduled for October 18, 2026 at 9:00PM ET. This market will resolve to “Katerina Siniakova” if Katerina Siniakova wins set 2. It will resolve to “Peyton Stearns” if Peyton Stearns 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 play has not begun by November 1, 2026, 11:59 PM ET (14 days after the scheduled start), this market will resolve 50-50. Resolution will be based on official WTA match statistics. This market may resolve only when the listed period of play has concluded and the result can be definitively determined by the listed resolution source(s).

LiquidityLOW
Select an outcome on the detail pageUnavailable
Price unavailable
Volume$0
Liquidity$1.5K
End DateOct 26, 2026
View Details
POLYMARKETSports
Siniakova vs. Stearns: Set 2 Games Over/Under 8.5

Siniakova vs. Stearns: Set 2 Games Over/Under 8.5

This market refers to the tennis match between Katerina Siniakova and Peyton Stearns in the Japan Women's Open, originally scheduled for October 18, 2026 at 9:00PM 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 begins but is not completed, this market will resolve 50-50, unless the outcome has already been unconditionally determined based on completed play. An outcome is considered unconditionally determined if it would have been guaranteed under every possible completion of the set played according to the match format published by the tournament organizer for that round, including whether the set is decided by a tiebreak or played as a match tiebreak. For example, for a line of 9.5, if play stops with set 2 at 5-4, completing the set would have required at least 1 additional game, resulting in at least 10 games played, so "Over" would resolve as the winning outcome. If the match ends before set 2 is reached, this market will resolve 50-50. If the match is canceled before play begins, or play has not begun by November 1, 2026, 11:59 PM ET (14 days after the scheduled start), this market will also resolve 50-50. Resolution will be based on official WTA results. This market may resolve only when the listed period of play has concluded and the result can be definitively determined by the listed resolution source(s).

LiquidityLOW
Select an outcome on the detail pageUnavailable
Price unavailable
Volume$0
Liquidity$0
End DateOct 26, 2026
View Details
POLYMARKETSports
Siniakova vs. Stearns: Set 2 Games Over/Under 9.5

Siniakova vs. Stearns: Set 2 Games Over/Under 9.5

This market refers to the tennis match between Katerina Siniakova and Peyton Stearns in the Japan Women's Open, originally scheduled for October 18, 2026 at 9:00PM 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 begins but is not completed, this market will resolve 50-50, unless the outcome has already been unconditionally determined based on completed play. An outcome is considered unconditionally determined if it would have been guaranteed under every possible completion of the set played according to the match format published by the tournament organizer for that round, including whether the set is decided by a tiebreak or played as a match tiebreak. For example, for a line of 9.5, if play stops with set 2 at 5-4, completing the set would have required at least 1 additional game, resulting in at least 10 games played, so "Over" would resolve as the winning outcome. If the match ends before set 2 is reached, this market will resolve 50-50. If the match is canceled before play begins, or play has not begun by November 1, 2026, 11:59 PM ET (14 days after the scheduled start), this market will also resolve 50-50. Resolution will be based on official WTA results. This market may resolve only when the listed period of play has concluded and the result can be definitively determined by the listed resolution source(s).

LiquidityLOW
Select an outcome on the detail pageUnavailable
Price unavailable
Volume$0
Liquidity$0
End DateOct 26, 2026
View Details
POLYMARKETSports
Siniakova vs. Stearns: Set 2 Games Over/Under 10.5

Siniakova vs. Stearns: Set 2 Games Over/Under 10.5

This market refers to the tennis match between Katerina Siniakova and Peyton Stearns in the Japan Women's Open, originally scheduled for October 18, 2026 at 9:00PM 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 begins but is not completed, this market will resolve 50-50, unless the outcome has already been unconditionally determined based on completed play. An outcome is considered unconditionally determined if it would have been guaranteed under every possible completion of the set played according to the match format published by the tournament organizer for that round, including whether the set is decided by a tiebreak or played as a match tiebreak. For example, for a line of 9.5, if play stops with set 2 at 5-4, completing the set would have required at least 1 additional game, resulting in at least 10 games played, so "Over" would resolve as the winning outcome. If the match ends before set 2 is reached, this market will resolve 50-50. If the match is canceled before play begins, or play has not begun by November 1, 2026, 11:59 PM ET (14 days after the scheduled start), this market will also resolve 50-50. Resolution will be based on official WTA results. This market may resolve only when the listed period of play has concluded and the result can be definitively determined by the listed resolution source(s).

LiquidityLOW
Select an outcome on the detail pageUnavailable
Price unavailable
Volume$0
Liquidity$19
End DateOct 26, 2026
View Details
POLYMARKETSports
Siniakova vs. Stearns: Set 1 Games Over/Under 8.5

Siniakova vs. Stearns: Set 1 Games Over/Under 8.5

This market refers to the tennis match between Katerina Siniakova and Peyton Stearns in the Japan Women's Open, originally scheduled for October 18, 2026 at 9:00PM 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. If the match is postponed or suspended, this market will remain open until the first set has been completed. A postponement alone will not trigger a 50-50 resolution. If the match is permanently abandoned before the first set is completed, or if the first set has not been completed by November 1, 2026, 11:59 PM ET, this market will resolve 50-50, unless the outcome has already been unconditionally determined based on completed play. An outcome is considered unconditionally determined if it would have been guaranteed under every possible completion of the set played according to the match format published by the tournament organizer for that round, including whether the set is decided by a tiebreak. For example, for a line of 9.5, if play stops with the first set at 5-4, completing the set would have required at least 1 additional game, resulting in at least 10 games played, so "Over" would resolve as the winning outcome. The primary resolution source for this market will be official WTA statistics; however, a consensus of credible reporting may also be used. This market may resolve only when the listed period of play has concluded and the result can be definitively determined by the listed resolution source(s).

LiquidityLOW
Select an outcome on the detail pageUnavailable
Price unavailable
Volume$0
Liquidity$0
End DateOct 26, 2026
View Details
POLYMARKETSports
Siniakova vs. Stearns: Set 1 Games Over/Under 10.5

Siniakova vs. Stearns: Set 1 Games Over/Under 10.5

This market refers to the tennis match between Katerina Siniakova and Peyton Stearns in the Japan Women's Open, originally scheduled for October 18, 2026 at 9:00PM 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. If the match is postponed or suspended, this market will remain open until the first set has been completed. A postponement alone will not trigger a 50-50 resolution. If the match is permanently abandoned before the first set is completed, or if the first set has not been completed by November 1, 2026, 11:59 PM ET, this market will resolve 50-50, unless the outcome has already been unconditionally determined based on completed play. An outcome is considered unconditionally determined if it would have been guaranteed under every possible completion of the set played according to the match format published by the tournament organizer for that round, including whether the set is decided by a tiebreak. For example, for a line of 9.5, if play stops with the first set at 5-4, completing the set would have required at least 1 additional game, resulting in at least 10 games played, so "Over" would resolve as the winning outcome. The primary resolution source for this market will be official WTA statistics; however, a consensus of credible reporting may also be used. This market may resolve only when the listed period of play has concluded and the result can be definitively determined by the listed resolution source(s).

LiquidityLOW
Select an outcome on the detail pageUnavailable
Price unavailable
Volume$0
Liquidity$10
End DateOct 26, 2026
View Details
POLYMARKETSports
Siniakova vs. Stearns: Match Over/Under 21.5

Siniakova vs. Stearns: Match Over/Under 21.5

This market refers to the tennis match between Katerina Siniakova and Peyton Stearns in the Japan Women's Open, originally scheduled for October 18, 2026 at 9:00PM ET. This market will resolve to "Over" if the total number of games completed equals or exceeds 22. Otherwise, it will resolve to "Under." All tiebreaks, including any Champions/Super tiebreak, count as one (1) game. If the match is postponed or suspended, this market will remain open until the match has been completed. A postponement alone will not trigger a 50-50 resolution. If the match is permanently abandoned before completion, or if the match has not been completed by November 1, 2026, 11:59 PM ET, this market will resolve 50-50, unless the outcome has already been unconditionally determined based on completed play. An outcome is considered unconditionally determined if it would have been guaranteed under every possible completion of the match played according to the match format published by the tournament organizer for that round, including whether a final set is played as a full set or as a match tiebreak. For example, for a line of 21.5, if play stops at 6-3, 5-6, completing the match would have required at least 2 additional games, resulting in at least 22 games played, so "Over" would resolve as the winning outcome. Likewise, if the published format replaces the final set with a match tiebreak, that tiebreak counts as one (1) game, so for a line of 22.5, if play stops at 6-2, 3-3, the match could have reached at most 22 games and "Under" would resolve as the winning outcome. The primary resolution source for this market will be official WTA statistics; however, a consensus of credible reporting may also be used.

LiquidityLOW
Select an outcome on the detail pageUnavailable
Price unavailable
Volume$0
Liquidity$1.4K
End DateOct 26, 2026
View Details
POLYMARKETSports
Japan Women's Open: Completed Match: Katerina Siniakova vs Peyton Stearns

Japan Women's Open: Completed Match: Katerina Siniakova vs Peyton Stearns

This market refers to the tennis match between Katerina Siniakova and Peyton Stearns in the Japan Women's Open, originally scheduled for October 18, 2026 at 9:00PM 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 a winner has not been determined by November 1, 2026, 11:59 PM ET (14 days after the scheduled start), 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.

LiquidityLOW
Yes outcome50.5%
Yes
Volume$0
Liquidity$10
End DateOct 26, 2026
View Details

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