TOTAL VOLUME:
$134.2b
24H VOL:
$130,522,377
24H TRANSACTIONS:
2,388,728,490
OPEN INTEREST:
$1,438,389,636
404,028
Markets across
30,214
events
MATCHED EVENTS:
2,681
PLATFORM COVERAGE:
5
Polymarket:
39%
VS.
Kalshi:
61%
Closed: Sep 17, 6:58 PM EST
Polymarket
This market refers to the doubles tennis match between Martins/Ortenzi and Rogers/Zamarripa in the Sao Paulo Open, originally scheduled for September 17, 2026 at 4:30PM ET. This market will resolve to 'Martins/Ortenzi' if the team of Martins/Ortenzi advances against Rogers/Zamarripa. This market will resolve to 'Rogers/Zamarripa' if the team of Rogers/Zamarripa advances against Martins/Ortenzi. If the match is canceled (not played at all), ends in a tie, or a winner has not been determined by October 1, 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 Martins/Ortenzi and Rogers/Zamarripa in the Sao Paulo Open, originally scheduled for September 17, 2026 at 4:30PM ET. This market will resolve to 'Martins/Ortenzi' if the team of Martins/Ortenzi advances against Rogers/Zamarripa. This market will resolve to 'Rogers/Zamarripa' if the team of Rogers/Zamarripa advances against Martins/Ortenzi. If the match is canceled (not played at all), ends in a tie, or a winner has not been determined by October 1, 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 statistical models and expert analysis, while this market aggregates the views of many individual traders. If a significant number of traders believe a sportsbook has mispriced an outcome, they can drive the odds on Polymarket in a different direction. It’s common to see discrepancies, especially early in the market's life, as information becomes available and traders refine their assessments.
On Polymarket, this market is priced through a continuous auction mechanism. Traders buy and sell shares representing their belief in the probability of Martins/Ortenzi winning the Sao Paulo Open doubles match. As more shares are bought for a particular outcome, the price of those shares increases, reflecting a higher implied probability. On Polymarket, prices reflect that venue's order book, liquidity, and how traders price the outcome right now. The price movement is driven entirely by supply and demand, with traders adjusting their positions based on new information and their own analysis of the match.
This market resolves around Sep 24, 2026, with the outcome confirmed once the event is verifiable from credible public reporting. Resolution will depend on the official results of the Sao Paulo Open doubles match between Martins/Ortenzi and Rogers/Zamarripa. The platform will verify the result against established sports data sources to determine which team won and settle the market accordingly. Traders holding shares in the winning outcome will receive a payout.
Several factors could influence the price of this market before Sep 24, 2026. Any news regarding player injuries, changes in team strategy, or even weather conditions affecting the match could shift trader sentiment. Unexpected results in other matches leading up to this one might also impact perceptions of the players' form and confidence. Furthermore, significant betting activity or large trades on Polymarket could create momentum and drive price fluctuations, reflecting a change in collective belief about the likely winner.