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: Jul 15, 3:00 PM EST
Polymarket
This market refers to the tennis match between Isabella Foshee and Simone Kay in the ITF Women Rancho Santa Fe, originally scheduled for July 8, 2026 at 3:00PM ET. This market will resolve to 'Isabella Foshee' if Isabella Foshee advances against Simone Kay. This market will resolve to 'Simone Kay' if Simone Kay advances against Isabella Foshee. 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 International Tennis Federation (ITF). A consensus of credible reporting may also be used.
This market refers to the tennis match between Isabella Foshee and Simone Kay in the ITF Women Rancho Santa Fe, originally scheduled for July 8, 2026 at 3:00PM ET. This market will resolve to 'Isabella Foshee' if Isabella Foshee advances against Simone Kay. This market will resolve to 'Simone Kay' if Simone Kay advances against Isabella Foshee. 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 International Tennis Federation (ITF). A consensus of credible reporting may also be used.
Prediction market odds and sportsbook odds often diverge because they reflect different mechanisms. Sportsbooks set lines to balance action and lock in profit margins, while prediction markets like this one are priced by traders wagering real capital on outcomes they believe will occur. Prediction markets tend to aggregate dispersed information efficiently, sometimes offering sharper probability estimates than traditional betting lines. However, sportsbooks may move faster on breaking news or injuries. Comparing this market's implied odds to major sportsbooks can reveal where consensus differs and highlight potential value or contrarian positioning.
On Polymarket, traders set prices by buying and selling outcome shares in an automated market maker system. On Polymarket, prices reflect that venue's order book, liquidity, and how traders price the outcome right now. The price of each share reflects the collective belief about the likelihood of that result, with higher prices indicating stronger conviction. As new information surfaces—such as player news or court conditions—traders adjust their positions, moving the price up or down. This continuous repricing mechanism ensures the market stays responsive to real-world developments and trader sentiment throughout the lead-up to the match.
This market resolves around Jul 15, 2026, once the match concludes and the result is verifiable from credible public reporting. The outcome is determined by the official match result—which player wins the contest. Until that point, traders can continue to buy and sell shares as odds shift with any developments affecting player status or match conditions. Resolution happens automatically once the event is confirmed, settling all positions based on the final verified outcome.
Several factors could shift odds significantly before Jul 15, 2026. Player injuries, illness, or withdrawal announcements would have immediate impact. Recent tournament results, head-to-head records, or changes in player ranking or form could influence trader positioning. Court surface conditions, weather forecasts, or scheduling changes might also matter. News about either competitor's training, coaching changes, or personal circumstances could sway sentiment. Additionally, if one player performs exceptionally well in lead-up events, traders may reassess the matchup probability, causing sharp price moves in this market.