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: Jul 22, 5:05 PM EST
Polymarket
This market refers to the doubles tennis match between Hilderbrand/Tracy and Goldhoff/Harper in the Bloomfield Hills, originally scheduled for July 21, 2026 at 10:00AM ET. This market will resolve to 'Hilderbrand/Tracy' if the team of Hilderbrand/Tracy advances against Goldhoff/Harper. This market will resolve to 'Goldhoff/Harper' if the team of Goldhoff/Harper advances against Hilderbrand/Tracy. 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 Hilderbrand/Tracy and Goldhoff/Harper in the Bloomfield Hills, originally scheduled for July 21, 2026 at 10:00AM ET. This market will resolve to 'Hilderbrand/Tracy' if the team of Hilderbrand/Tracy advances against Goldhoff/Harper. This market will resolve to 'Goldhoff/Harper' if the team of Goldhoff/Harper advances against Hilderbrand/Tracy. 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 trader bases and incentive structures. Sportsbooks set lines to balance action and lock in profit margins, while prediction markets aggregate the beliefs of many independent traders with real money at stake. For this doubles match, comparing Polymarket odds to traditional sportsbook lines can reveal where the crowd on each platform disagrees. Prediction markets tend to be efficient at pricing major events, though sharp discrepancies may signal value or highlight information asymmetries between venues.
On Polymarket, this market is priced through an automated market maker that adjusts odds continuously as traders buy and sell outcome shares. On Polymarket, prices reflect that venue's order book, liquidity, and how traders price the outcome right now. The current implied probability reflects the ratio of shares held for each team relative to the total pool. As more capital flows into one outcome, its price rises and the opposing outcome's price falls, creating a self-balancing mechanism. This dynamic pricing ensures liquidity and allows you to enter or exit positions at transparent, real-time rates 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 according to official tournament records or verified sports data. Traders holding shares in the winning outcome receive their payout, while losing shares expire worthless. The resolution process is automated once the event result is confirmed, ensuring a fair and transparent settlement for all participants.
Several factors could shift odds before the match begins or concludes. Player injuries, lineup changes, or withdrawal announcements would immediately impact perceived match quality and winning probability. Recent tournament performance, head-to-head records, and court conditions at Bloomfield Hills may influence trader positioning. News coverage, expert commentary, or betting action from sharp bettors on external sportsbooks can also trigger repricing. Late-breaking developments during warm-up or early match play could drive significant volatility as new information reaches the market.