TOTAL VOLUME:
$134.1b
24H VOL:
$141,541,542
24H TRANSACTIONS:
2,388,728,490
OPEN INTEREST:
$1,440,096,988
406,065
Markets across
30,522
events
MATCHED EVENTS:
2,692
PLATFORM COVERAGE:
5
Polymarket:
39%
VS.
Kalshi:
61%
Closed: Sep 9, 9:25 AM EST
Polymarket
This market refers to the tennis match between Mariia Masiianskaia and Yasmine Mansouri in the W15 Monastir, Main Draw, originally scheduled for September 9, 2026 at 5:00AM ET. This market will resolve to 'Mariia Masiianskaia' if Mariia Masiianskaia advances against Yasmine Mansouri. This market will resolve to 'Yasmine Mansouri' if Yasmine Mansouri advances against Mariia Masiianskaia. 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 Mariia Masiianskaia and Yasmine Mansouri in the W15 Monastir, Main Draw, originally scheduled for September 9, 2026 at 5:00AM ET. This market will resolve to 'Mariia Masiianskaia' if Mariia Masiianskaia advances against Yasmine Mansouri. This market will resolve to 'Yasmine Mansouri' if Yasmine Mansouri advances against Mariia Masiianskaia. 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.
Often, prediction market odds reflect a wisdom-of-the-crowd effect, potentially differing from traditional sportsbook odds. Sportsbooks set lines based on their own models and to balance action, while this market aggregates the beliefs of many individual traders. If a significant number of traders believe a sportsbook is mispricing a player's chances, the odds on Polymarket may move in the opposite direction. It’s common to see discrepancies, especially early in the market's life, as the market discovers and incorporates information. This can be a useful signal for identifying potential value.
On Polymarket, this market is priced through a continuous auction mechanism. Traders buy and sell shares representing their belief in the probability of a particular outcome. As more shares are bought for a specific outcome, its price increases, reflecting growing confidence. On Polymarket, prices reflect that venue's order book, liquidity, and how traders price the outcome right now. The price of a share directly corresponds to the implied probability of that outcome occurring, and the market aims to converge towards the true probability as the event approaches. Trading volume and order book depth also influence price discovery on the platform.
This market resolves around Sep 16, 2026, with the outcome confirmed once the event is verifiable from credible public reporting. The resolution will be based on the official result of the Monastir tennis match, as determined by the tournament organizers and reported by widely recognized sports news sources. The platform will verify the result against these sources to ensure accuracy and determine which outcome corresponds to the actual winner of the match. Traders holding shares in the winning outcome will be entitled to a payout.
Several factors could influence the price of this market. Any news regarding player form, injuries, or changes to playing conditions could shift trader sentiment. Unexpected results in other matches involving these players could also impact predictions. Furthermore, significant betting activity or large trades on Polymarket itself can cause noticeable price movements. Even broader factors like weather conditions in Monastir, or public perception of a player’s chances, could play a role in how this market evolves leading up to the match’s conclusion.