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 5, 6:02 PM EST
Polymarket
This market refers to the doubles tennis match between Doumbia/Reboul and Stevenson/Willis in the US Open ATP, originally scheduled for September 4, 2026 at 11:00AM ET. This market will resolve to 'Doumbia/Reboul' if the team of Doumbia/Reboul advances against Stevenson/Willis. This market will resolve to 'Stevenson/Willis' if the team of Stevenson/Willis advances against Doumbia/Reboul. If the match is canceled (not played at all), ends in a tie, or a winner has not been determined by September 18, 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 ATP Tour. A consensus of credible reporting may also be used.
This market refers to the doubles tennis match between Doumbia/Reboul and Stevenson/Willis in the US Open ATP, originally scheduled for September 4, 2026 at 11:00AM ET. This market will resolve to 'Doumbia/Reboul' if the team of Doumbia/Reboul advances against Stevenson/Willis. This market will resolve to 'Stevenson/Willis' if the team of Stevenson/Willis advances against Doumbia/Reboul. If the match is canceled (not played at all), ends in a tie, or a winner has not been determined by September 18, 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 ATP Tour. A consensus of credible reporting may also be used.
Typically, prediction market odds reflect the wisdom of the crowd and can often differ from traditional sportsbook odds. Sportsbooks set lines based on their own models and aim to profit from margins, while this market allows participants to directly express their beliefs about the outcome. If a significant discrepancy exists between this market and sportsbook lines, it may indicate differing opinions on the likelihood of each team winning, or potentially an arbitrage opportunity for informed traders. It’s important to consider both sources when forming your own assessment.
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 reflects the probability of that outcome occurring, as perceived by the market participants. On Polymarket, prices reflect that venue's order book, liquidity, and how traders price the outcome right now. The more traders who believe Doumbia/Reboul will win, the higher the price of shares representing that outcome will climb, and vice versa for Stevenson/Willis. This dynamic pricing ensures the market reflects the collective intelligence of those trading it.
This market resolves around Sep 11, 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 doubles match between Doumbia/Reboul and Stevenson/Willis. The winning team as declared by the tournament organizers will determine the settlement of this market. Traders should monitor official tournament results to understand when the outcome is finalized and the market is settled.
Several factors could influence the price of this market before the match concludes. Any news regarding player injuries, changes in playing conditions, or even significant shifts in public perception could cause the odds to move. Unexpected performance in earlier rounds of the tournament for either team could also impact trader sentiment. Additionally, large volume trades on Polymarket could indicate informed activity and potentially shift the market price, so monitoring trading activity is crucial.