TOTAL VOLUME:
$134.1b
24H VOL:
$133,388,117
24H TRANSACTIONS:
2,388,728,490
OPEN INTEREST:
$1,436,095,462
405,232
Markets across
30,526
events
MATCHED EVENTS:
2,693
PLATFORM COVERAGE:
5
Polymarket:
39%
VS.
Kalshi:
61%
Closed: Jul 25, 10:00 AM EST
Polymarket
This market refers to the tennis match between Mayar Sherif and Oleksandra Oliynykova in the Iasi Open, originally scheduled for July 18, 2026 at 10:00AM ET. This market will resolve to 'Mayar Sherif' if Mayar Sherif advances against Oleksandra Oliynykova. This market will resolve to 'Oleksandra Oliynykova' if Oleksandra Oliynykova advances against Mayar Sherif. If the match is canceled (not played at all), ends in a tie, or is delayed beyond 7 days from the scheduled date without a winner determined, 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 WTA Tour. A consensus of credible reporting may also be used.
This market refers to the tennis match between Mayar Sherif and Oleksandra Oliynykova in the Iasi Open, originally scheduled for July 18, 2026 at 10:00AM ET. This market will resolve to 'Mayar Sherif' if Mayar Sherif advances against Oleksandra Oliynykova. This market will resolve to 'Oleksandra Oliynykova' if Oleksandra Oliynykova advances against Mayar Sherif. If the match is canceled (not played at all), ends in a tie, or is delayed beyond 7 days from the scheduled date without a winner determined, 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 WTA Tour. A consensus of credible reporting may also be used.
Prediction market odds and sportsbook odds often diverge because they reflect different participant bases and incentive structures. Sportsbooks set lines to balance action and lock in profit margins, while prediction markets are driven by traders seeking to profit on accurate forecasts. This market aggregates the views of many independent traders rather than a single bookmaker, which can sometimes surface insights that traditional oddsmakers miss. Comparing the two can reveal where consensus differs and highlight potential value opportunities.
On Polymarket, prices reflect that venue's order book, liquidity, and how traders price the outcome right now. On Polymarket, this market is priced through an automated market maker that converts trader orders into real-time probability quotes. When you buy shares representing one outcome, the price adjusts based on the depth of liquidity available and the ratio of shares already in circulation. Traders compete to identify mispriced outcomes, and their collective activity continuously updates the odds. The system rewards accurate predictions and penalizes poor forecasts, creating a financial incentive for honest price discovery.
This market resolves around Jul 25, 2026, once the match concludes and the result is verifiable from credible public reporting. The outcome will reflect which player wins the contest. Until that point, traders can continue to buy and sell shares as new information emerges—such as player form, injury updates, or head-to-head records—that might shift expectations about the final result.
Several factors could shift trader sentiment before the match takes place. Injury announcements or fitness concerns affecting either player would likely trigger sharp repricing. Recent tournament results, court surface performance history, and head-to-head records may influence positioning as traders reassess relative strength. Weather conditions on match day, draws that reveal the bracket context, or news about player form and confidence can all prompt traders to adjust their positions. Even casual social media momentum or expert commentary sometimes catalyzes volume spikes in prediction markets.