TOTAL VOLUME:
$134.2b
24H VOL:
$134,145,987
24H TRANSACTIONS:
2,388,728,490
OPEN INTEREST:
$1,441,166,947
406,422
Markets across
30,383
events
MATCHED EVENTS:
2,688
PLATFORM COVERAGE:
5
Polymarket:
39%
VS.
Kalshi:
61%
Closed: Sep 12, 3:44 AM EST
Polymarket
This market refers to the tennis match between Keisuke Saitoh and Seongchan Hong in the M25 Sapporo, Main Draw, originally scheduled for September 11, 2026 at 10:00PM ET. This market will resolve to 'Keisuke Saitoh' if Keisuke Saitoh advances against Seongchan Hong. This market will resolve to 'Seongchan Hong' if Seongchan Hong advances against Keisuke Saitoh. If the match is canceled (not played at all), ends in a tie, or a winner has not been determined by September 25, 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 International Tennis Federation (ITF). A consensus of credible reporting may also be used.
This market refers to the tennis match between Keisuke Saitoh and Seongchan Hong in the M25 Sapporo, Main Draw, originally scheduled for September 11, 2026 at 10:00PM ET. This market will resolve to 'Keisuke Saitoh' if Keisuke Saitoh advances against Seongchan Hong. This market will resolve to 'Seongchan Hong' if Seongchan Hong advances against Keisuke Saitoh. If the match is canceled (not played at all), ends in a tie, or a winner has not been determined by September 25, 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 International Tennis Federation (ITF). A consensus of credible reporting may also be used.
Prediction market odds often reflect the collective wisdom of a diverse group of bettors, potentially offering a different perspective than traditional sportsbooks. Sportsbook odds are typically set by professional oddsmakers, while this market is driven by individual traders. It’s common to see discrepancies between the two, especially before significant events or when new information emerges. Comparing the two can be a useful exercise for informed decision-making, though it’s important to remember they represent different types of forecasting.
On Polymarket, this market is priced through a continuous auction mechanism, where traders buy and sell shares representing their belief in the outcome. The price of a share directly corresponds to the implied probability of that outcome occurring. On Polymarket, prices reflect that venue's order book, liquidity, and how traders price the outcome right now. As more traders participate, the price adjusts to reflect the evolving consensus. The current price reflects the collective assessment of all participants, making it a dynamic and responsive indicator of expectations for the Saitoh vs Hong match.
This market resolves around Sep 19, 2026, with the outcome confirmed once the event is verifiable from credible public reporting. The resolution will be based on the official result of the M25 Sapporo match between Keisuke Saitoh and Seongchan Hong. The platform will verify the result against publicly available sources to determine which outcome corresponds to the actual event result. Traders will then be able to claim their winnings based on the final outcome.
Several factors could influence trading activity and shift the odds in this market. Any news regarding player injuries, changes in match scheduling, or updates on player form could all have an impact. Unexpected announcements about strategies or team compositions could also move the market. Furthermore, significant betting activity itself can create momentum, driving prices up or down as traders react to each other's actions. Monitoring these signals will be key to understanding the market's movements before Sep 19, 2026.