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 9, 1:29 AM EST
Polymarket
This market refers to the tennis match between Sara Saito and Xinxin Yao in the W50 Guiyang, Main Draw, originally scheduled for September 8, 2026 at 11:00PM ET. This market will resolve to 'Sara Saito' if Sara Saito advances against Xinxin Yao. This market will resolve to 'Xinxin Yao' if Xinxin Yao advances against Sara Saito. If the match is canceled (not played at all), ends in a tie, or a winner has not been determined by September 22, 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 Sara Saito and Xinxin Yao in the W50 Guiyang, Main Draw, originally scheduled for September 8, 2026 at 11:00PM ET. This market will resolve to 'Sara Saito' if Sara Saito advances against Xinxin Yao. This market will resolve to 'Xinxin Yao' if Xinxin Yao advances against Sara Saito. If the match is canceled (not played at all), ends in a tie, or a winner has not been determined by September 22, 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 forecasters, which can sometimes differ from those set by sportsbooks. Sportsbooks typically set odds to maximize profit, factoring in house edges and public biases, while this market relies on traders directly expressing their beliefs about the outcome. If there's a significant discrepancy, it could indicate that the crowd believes a sportsbook has mispriced the event, or that new information hasn't yet been fully incorporated into sportsbook lines. It’s common to see prediction markets move faster to incorporate new information than traditional betting venues.
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 probability of that outcome occurring. As more people buy shares in a particular outcome, its price increases, and vice versa. On Polymarket, prices reflect that venue's order book, liquidity, and how traders price the outcome right now. The market's price reflects the aggregated sentiment of all participants, creating a dynamic and real-time assessment of the event's potential results. This allows traders to express their views and profit if their predictions prove accurate.
This market resolves around Sep 16, 2026, with the outcome confirmed once the event is verifiable from credible public reporting. The result will be determined by the official result of the W50 Guiyang match between Sara Saito and Xinxin Yao. Any official announcement regarding the match's completion and winner will serve as the basis for determining the outcome of this market. Traders will be able to see the final result reflected in the market's settlement data shortly after the official result is available.
Several factors could influence the price movement of this market before resolution. Any news regarding player injuries, changes in playing conditions, or updated rankings could significantly shift trader sentiment. Unexpected performance in other matches leading up to the event could also impact perceptions of each player's form. Furthermore, major upsets in similar tournaments or events could cause traders to reassess the probabilities, leading to price fluctuations. Publicly available analysis from sports experts and commentators could also play a role in shaping market expectations.