PolymarketOpen

Katie Boulter vs. Katerina Siniakova: Total Sets O/U 2.5

Under 2.561%
Over 2.539%

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24h volume$324
7d volume$324
30d volume$324
Liquidity$160
Spread20%
ResolvesOct 31, 2026in 6 days

Probability history

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Probability history0%25%50%75%100%Oct 23, 12:46 PMOct 23, 10:31 PMOct 24, 08:15 AMOct 24, 06:00 PMShaded periods have no successful hourly price check.Shaded periods have no successful hourly price check.Shaded periods have no successful hourly price check.Shaded periods have no successful hourly price check.Shaded periods have no successful hourly price check.Shaded periods have no successful hourly price check.Shaded periods have no successful hourly price check.Shaded periods have no successful hourly price check.Shaded periods have no successful hourly price check.Shaded periods have no successful hourly price check.Shaded periods have no successful hourly price check.Shaded periods have no successful hourly price check.Shaded periods have no successful hourly price check.Shaded periods have no successful hourly price check.Shaded periods have no successful hourly price check.Shaded periods have no successful hourly price check.Shaded periods have no successful hourly price check.Shaded periods have no successful hourly price check.Shaded periods have no successful hourly price check.Shaded periods have no successful hourly price check.Shaded periods have no successful hourly price check.

Based on this market’s outcome prices, expressed as probabilities.

Resolution rules

This market refers to the tennis match between Katie Boulter and Katerina Siniakova in the Japan Women's Open, originally scheduled for October 24, 2026 at 12:30AM 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 7, 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.

Sourcehttps://www.wtatennis.com/scores

Other legs of this event

MarketVenuePriceStatus
Japan Women's Open: Katie Boulter vs Katerina SiniakovaPolymarket85% Katerina SiniakovaOpen
Boulter vs. Siniakova: Match O/U 22.5Polymarket62% UnderOpen
Boulter vs. Siniakova: Match O/U 21.5Polymarket50% OverOpen
Set 2 Winner: Katie Boulter vs Katerina SiniakovaPolymarket63% Katerina SiniakovaOpen
Set Handicap: Katerina Siniakova (-1.5) vs Katie Boulter (+1.5)Polymarket63% Katerina SiniakovaOpen
Japan Women's Open: Completed Match: Katie Boulter vs Katerina SiniakovaPolymarket100% YesOpen
Game Spread: Katerina Siniakova (-2.5) vs Katie Boulter (+2.5)Polymarket50% Katerina SiniakovaOpen
Boulter vs. Siniakova: Set 2 Games O/U 9.5Polymarket100% OverOpen
Boulter vs. Siniakova: Set 1 Games O/U 8.5Polymarket50% UnderOpen
Boulter vs. Siniakova: Set 1 Games O/U 9.5Polymarket50% UnderOpen
Boulter vs. Siniakova: Set 2 Games O/U 8.5Polymarket100% OverOpen
Boulter vs. Siniakova: Match O/U 23.5Polymarket50% OverOpen
Set 1 Winner: Katie Boulter vs Katerina SiniakovaPolymarket58% Katerina SiniakovaOpen
Boulter vs. Siniakova: Set 1 Games O/U 10.5Polymarket50% OverOpen
Set Handicap: Katie Boulter (-1.5) vs Katerina Siniakova (+1.5)Polymarket78% Katerina SiniakovaOpen
Boulter vs. Siniakova: Set 2 Games O/U 10.5Polymarket50% UnderOpen

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As of Oct 24, 06:15 PM UTC