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 7, 5:42 PM EST
Polymarket
This market refers to the doubles tennis match between Hsieh/Ostapenko and Chan/Joint in the US Open WTA, originally scheduled for September 7, 2026 at 11:00AM ET. This market will resolve to 'Hsieh/Ostapenko' if the team of Hsieh/Ostapenko advances against Chan/Joint. This market will resolve to 'Chan/Joint' if the team of Chan/Joint advances against Hsieh/Ostapenko. If the match is canceled (not played at all), ends in a tie, or a winner has not been determined by September 21, 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 Hsieh/Ostapenko and Chan/Joint in the US Open WTA, originally scheduled for September 7, 2026 at 11:00AM ET. This market will resolve to 'Hsieh/Ostapenko' if the team of Hsieh/Ostapenko advances against Chan/Joint. This market will resolve to 'Chan/Joint' if the team of Chan/Joint advances against Hsieh/Ostapenko. If the match is canceled (not played at all), ends in a tie, or a winner has not been determined by September 21, 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 to balance action, while this market allows traders to freely adjust probabilities based on their own research and information. If a significant discrepancy exists, it may indicate that the market believes a sportsbook has mispriced the event, or that new information hasn’t yet been fully incorporated into sportsbook lines. It's valuable to compare both to gain a broader understanding of potential outcomes.
On Polymarket, this market is priced through a continuous auction mechanism, where traders buy and sell shares representing their belief in the likelihood of Hsieh/Ostapenko winning against Chan/Joint. The price of these shares fluctuates based on supply and demand, effectively creating a real-time probability assessment. On Polymarket, prices reflect that venue's order book, liquidity, and how traders price the outcome right now. The closer the match gets, the more responsive the price will be to new information and trading activity, reflecting the collective intelligence of the market participants.
This market resolves around Sep 14, 2026, with the outcome confirmed once the event is verifiable from credible public reporting. Resolution will be based on the official result of the US Open women's doubles match between Hsieh/Ostapenko and Chan/Joint, as declared by the tournament organizers. The market will determine which team ultimately wins the match, and shares will be settled accordingly. Traders should monitor official sources for the final result to understand the resolution of this market.
Several factors could influence trading activity and move this market. Any news regarding player injuries, changes in playing conditions, or tactical adjustments announced by either team could shift probabilities. Unexpected results in other matches leading up to this one, or even commentary from tennis analysts, could also impact trader sentiment. Furthermore, significant trading volume itself can create momentum, driving the price of shares in either direction as traders react to each other's actions.