TOTAL VOLUME:
$134.2b
24H VOL:
$143,246,370
24H TRANSACTIONS:
2,403,290,006
OPEN INTEREST:
$1,452,035,386
405,032
Markets across
30,543
events
MATCHED EVENTS:
2,690
PLATFORM COVERAGE:
5
Polymarket:
39%
VS.
Kalshi:
61%
Closed: Sep 21, 11:34 AM EST
Polymarket
This market refers to the doubles tennis match between Christie/Silva and Ayukawa/Webley-Smith in the Porto, originally scheduled for September 21, 2026 at 9:00AM ET. This market will resolve to 'Christie/Silva' if the team of Christie/Silva advances against Ayukawa/Webley-Smith. This market will resolve to 'Ayukawa/Webley-Smith' if the team of Ayukawa/Webley-Smith advances against Christie/Silva. If the match is canceled (not played at all), ends in a tie, or a winner has not been determined by October 5, 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 team advances due to the opponent's retirement, default, or disqualification, this market will resolve to the team who advances. If the match ends in a walkover (a team 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.
This market refers to the doubles tennis match between Christie/Silva and Ayukawa/Webley-Smith in the Porto, originally scheduled for September 21, 2026 at 9:00AM ET. This market will resolve to 'Christie/Silva' if the team of Christie/Silva advances against Ayukawa/Webley-Smith. This market will resolve to 'Ayukawa/Webley-Smith' if the team of Ayukawa/Webley-Smith advances against Christie/Silva. If the match is canceled (not played at all), ends in a tie, or a winner has not been determined by October 5, 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 team advances due to the opponent's retirement, default, or disqualification, this market will resolve to the team who advances. If the match ends in a walkover (a team 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.
Prediction market odds often reflect the wisdom of the crowd, potentially differing from traditional sportsbook odds. Sportsbooks set lines based on their own models and aim to balance action on both sides, while this market allows anyone to express their belief about the outcome. If a significant discrepancy exists between prediction market probabilities and sportsbook odds, it might indicate that the market believes the sportsbook is mispricing the event. It's common to see differences, especially as new information emerges or public sentiment shifts.
On Polymarket, this market is priced through a continuous auction mechanism, where traders buy and sell shares representing their belief in each outcome. The price of a share directly corresponds to the implied probability of that outcome occurring. As more traders participate and express their views, the prices adjust to reflect the collective assessment of the Porto doubles match. On Polymarket, prices reflect that venue's order book, liquidity, and how traders price the outcome right now. The market’s price is determined solely by supply and demand from traders on Polymarket.
This market resolves around Sep 28, 2026, with the outcome confirmed once the event is verifiable from credible public reporting. Resolution will be based on the official result of the Porto doubles match, determining which team advances. The platform will verify the result against publicly available sources to ensure accuracy and transparency. Traders holding shares in the winning outcome will be entitled to a payout, while those holding shares in the losing outcome will not.
Several factors could influence trading activity in this market. Any news regarding player injuries, changes in team strategy, or unexpected performance in preceding matches could shift trader sentiment. Publicly available analysis from tennis experts, or even significant social media discussion, might also impact the market. Unexpected weather conditions during the match, or even perceived referee bias, could also cause the odds to move as traders react to new information and reassess the probabilities of each team winning the Porto doubles match.