TOTAL VOLUME:
$134.2b
24H VOL:
$126,590,312
24H TRANSACTIONS:
2,388,728,490
OPEN INTEREST:
$1,439,516,703
404,175
Markets across
30,277
events
MATCHED EVENTS:
2,685
PLATFORM COVERAGE:
5
Polymarket:
39%
VS.
Kalshi:
61%
Closed: Jul 22, 1:01 PM EST
Polymarket
This market refers to the doubles tennis match between Bayldon/Harper and Reynolds/Watt in the Bloomfield Hills, originally scheduled for July 21, 2026 at 10:00AM ET. This market will resolve to 'Bayldon/Harper' if the team of Bayldon/Harper advances against Reynolds/Watt. This market will resolve to 'Reynolds/Watt' if the team of Reynolds/Watt advances against Bayldon/Harper. 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 team advances due to the opponent's retirement, default, or disqualification, this market will resolve to the team who advances. If the match ends in a walkover (a team 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 ATP Tour. A consensus of credible reporting may also be used.
This market refers to the doubles tennis match between Bayldon/Harper and Reynolds/Watt in the Bloomfield Hills, originally scheduled for July 21, 2026 at 10:00AM ET. This market will resolve to 'Bayldon/Harper' if the team of Bayldon/Harper advances against Reynolds/Watt. This market will resolve to 'Reynolds/Watt' if the team of Reynolds/Watt advances against Bayldon/Harper. 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 team advances due to the opponent's retirement, default, or disqualification, this market will resolve to the team who advances. If the match ends in a walkover (a team 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 ATP 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 aggregate the beliefs of traders risking real capital on the outcome. This market aggregates trader conviction directly, which can reveal information gaps or contrarian views that traditional sportsbooks may not immediately price in. Comparing the two can highlight where consensus differs most sharply.
On Polymarket, this market is priced through an automated market maker that converts trader orders into real-time probability estimates. On Polymarket, prices reflect that venue's order book, liquidity, and how traders price the outcome right now. The price you see reflects the cumulative bets placed on each outcome; as more capital flows toward one side, the odds shift to balance supply and demand. Traders buy and sell shares representing each possible result, and the platform's pricing algorithm ensures continuous liquidity and transparent price discovery throughout the trading window.
This market resolves around Jul 28, 2026, once the doubles match concludes and the result is verifiable from credible public reporting. The outcome is determined by which team wins the match on the day. Traders holding shares in the winning outcome receive their payout, while those on the losing side forfeit their stake. Resolution is straightforward and tied directly to the official match result.
Player form, recent head-to-head records, injury reports, and court conditions at Bloomfield Hills can all shift trader sentiment before the match. Lineup confirmations or last-minute roster changes often trigger sharp price moves. Media coverage highlighting one team's momentum or a player's hot streak may also influence positioning. Weather forecasts and surface-specific advantages can sway expectations, especially in doubles play where team chemistry and serve-and-volley tactics matter significantly. Watch for any official announcements that affect player availability or match scheduling.