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 21, 10:00 AM EST
Polymarket
This market refers to the tennis match between Rebecca Marino and Mei Yamaguchi in the ITF Women Granby, originally scheduled for July 14, 2026 at 10:00AM ET. This market will resolve to 'Rebecca Marino' if Rebecca Marino advances against Mei Yamaguchi. This market will resolve to 'Mei Yamaguchi' if Mei Yamaguchi advances against Rebecca Marino. 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 Rebecca Marino and Mei Yamaguchi in the ITF Women Granby, originally scheduled for July 14, 2026 at 10:00AM ET. This market will resolve to 'Rebecca Marino' if Rebecca Marino advances against Mei Yamaguchi. This market will resolve to 'Mei Yamaguchi' if Mei Yamaguchi advances against Rebecca Marino. 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 participant bases and incentive structures. Sportsbooks set lines to balance action and lock in profit margins, while prediction markets aggregate the beliefs of traders risking real capital on outcomes. This market aggregates thousands of independent forecasts, which can reveal information gaps or consensus shifts that traditional sportsbooks lag in pricing. Comparing the two can highlight value: if this market implies a higher or lower probability than a sportsbook, it may signal where informed traders see an edge.
On Polymarket, this market is priced through an automated market maker that converts trader activity into real-time probabilities. On Polymarket, prices reflect that venue's order book, liquidity, and how traders price the outcome right now. Each outcome is represented as a tradable share, and the price of each share reflects the collective forecast of all active traders. As new bets flow in, the price adjusts instantly to balance supply and demand. This continuous repricing mechanism means the odds you see are always current and responsive to breaking news, injury reports, or shifts in player form.
This market resolves around Jul 21, 2026, once the match concludes and the result is verified against credible public sources. The outcome is determined by the official match result—which player wins the ITF Granby event. No ambiguity exists in tennis outcomes; the winner is clear from the scoreline and tournament records. Your position settles automatically once the event is finalized and confirmed through standard sports reporting channels.
Several catalysts can shift odds before Jul 21, 2026. Injury announcements or withdrawal news for either player would trigger sharp repricing. Recent tournament results, head-to-head records, and surface-specific form updates often drive trading volume as bettors reassess win probabilities. Court conditions, weather forecasts, and draw announcements can also influence sentiment. Media coverage highlighting player momentum or ranking implications may sway the crowd. Watch for late-breaking fitness updates or coaching changes in the days leading up to the match, as these frequently spark significant price swings.