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 9, 11:01 AM EST
Polymarket
This market refers to the tennis match between Sarah Boussaffir and Sandeepti Singh Rao in the W15 Monastir, Main Draw, originally scheduled for September 9, 2026 at 6:00AM ET. This market will resolve to 'Sarah Boussaffir' if Sarah Boussaffir advances against Sandeepti Singh Rao. This market will resolve to 'Sandeepti Singh Rao' if Sandeepti Singh Rao advances against Sarah Boussaffir. If the match is canceled (not played at all), ends in a tie, or a winner has not been determined by September 23, 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 player advances due to the opponent's retirement, default, or disqualification, this market will resolve to the player who advances. If the match ends in a walkover (player 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 International Tennis Federation (ITF). A consensus of credible reporting may also be used.
This market refers to the tennis match between Sarah Boussaffir and Sandeepti Singh Rao in the W15 Monastir, Main Draw, originally scheduled for September 9, 2026 at 6:00AM ET. This market will resolve to 'Sarah Boussaffir' if Sarah Boussaffir advances against Sandeepti Singh Rao. This market will resolve to 'Sandeepti Singh Rao' if Sandeepti Singh Rao advances against Sarah Boussaffir. If the match is canceled (not played at all), ends in a tie, or a winner has not been determined by September 23, 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 player advances due to the opponent's retirement, default, or disqualification, this market will resolve to the player who advances. If the match ends in a walkover (player 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 International Tennis Federation (ITF). A consensus of credible reporting may also be used.
Prediction market odds often reflect the wisdom of the crowd, potentially differing from initial sportsbook odds which can be influenced by factors like public bias or sharp action. Sportsbooks set lines to balance action, while this market aggregates diverse opinions. If a significant number of traders believe a sportsbook is mispricing a player's chances, the prediction market odds will adjust accordingly. It’s common to see discrepancies, especially early on, as information and sentiment evolve. Examining these differences can offer insights into market perceptions.
On Polymarket, this market is priced through a continuous auction mechanism where traders buy and sell shares representing their belief in the probability of a specific outcome. The price of a share directly corresponds to the implied probability of that outcome occurring. 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 fluctuates, reflecting the collective forecast. The market efficiently incorporates new information and adjusts probabilities in real-time, making it a dynamic representation of expectations for the Monastir tennis match.
This market resolves around Sep 16, 2026, with the outcome confirmed once the event is verifiable from credible public reporting. Resolution will depend on the official result of the Monastir tennis match between Sarah Boussaffir and Sandeepti Singh Rao. The platform will verify the winner based on publicly available match results. Traders holding shares in the winning outcome will be paid out according to the final market price at resolution, while those holding shares in the losing outcome will forfeit their investment.
Several factors could influence this market. Any news regarding player form, injuries, or changes in playing conditions could significantly shift trader sentiment. Unexpected upsets in other matches involving these players could also impact perceptions of their relative strengths. Furthermore, major shifts in public opinion, perhaps driven by social media or expert analysis, could lead to changes in trading volume and price. Even minor updates regarding the players’ preparation or travel arrangements could move the market, as traders react to new information.