TOTAL VOLUME:
$134.1b
24H VOL:
$133,388,117
24H TRANSACTIONS:
2,388,728,490
OPEN INTEREST:
$1,436,095,462
405,232
Markets across
30,526
events
MATCHED EVENTS:
2,693
PLATFORM COVERAGE:
5
Polymarket:
39%
VS.
Kalshi:
61%
Closed: Sep 4, 10:49 PM EST
Polymarket
This market refers to the doubles tennis match between Williams/Williams and Chan/Joint in the US Open WTA, originally scheduled for September 3, 2026 at 11:00AM ET. This market will resolve to 'Williams/Williams' if the team of Williams/Williams advances against Chan/Joint. This market will resolve to 'Chan/Joint' if the team of Chan/Joint advances against Williams/Williams. If the match is canceled (not played at all), ends in a tie, or a winner has not been determined by September 17, 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 Williams/Williams and Chan/Joint in the US Open WTA, originally scheduled for September 3, 2026 at 11:00AM ET. This market will resolve to 'Williams/Williams' if the team of Williams/Williams advances against Chan/Joint. This market will resolve to 'Chan/Joint' if the team of Chan/Joint advances against Williams/Williams. If the match is canceled (not played at all), ends in a tie, or a winner has not been determined by September 17, 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.
Typically, prediction market odds reflect the wisdom of the crowd and can differ from traditional sportsbook odds. Sportsbooks often set initial lines based on their own analysis and may incorporate a margin for profit, while this market allows traders to express their own independent assessments. If a significant discrepancy exists, arbitrage opportunities may arise, where traders can profit by simultaneously betting on both platforms. However, it’s important to note that market participants’ opinions can be influenced by various factors, leading to differences in probabilities.
On Polymarket, this market is priced through a continuous auction mechanism where traders buy and sell shares representing their belief in the probability of Williams/Williams versus Chan/Joint winning. The price of a share directly corresponds to the implied probability of that outcome. On Polymarket, prices reflect that venue's order book, liquidity, and how traders price the outcome right now. As more traders participate and express their views, the price adjusts to reflect the collective expectation. This dynamic pricing ensures that the market odds are constantly updated based on the latest information and sentiment.
This market resolves around Sep 10, 2026, with the outcome confirmed once the event is verifiable from credible public reporting. Resolution will depend on the official results of the US Open women's doubles match between Williams/Williams and Chan/Joint. The winning team, as determined by the official tournament organizers, will dictate the outcome of this market. Any disputes or challenges to the official results will be handled according to Polymarket’s standard procedures.
Several factors could influence the price of this market before the match concludes. Any news regarding player injuries, changes in playing conditions, or even shifts in public perception could cause traders to reassess their probabilities. Unexpected performance in earlier rounds of the tournament for either team could also significantly impact the market. Furthermore, major upsets in other matches within the US Open could indirectly affect sentiment and trading activity in this market, leading to price fluctuations.