TOTAL VOLUME:
$134.1b
24H VOL:
$113,466,932
24H TRANSACTIONS:
2,388,728,490
OPEN INTEREST:
$1,423,222,590
402,751
Markets across
30,217
events
MATCHED EVENTS:
2,632
PLATFORM COVERAGE:
5
Polymarket:
39%
VS.
Kalshi:
61%
Closed: Jul 22, 7:20 AM EST
Polymarket
This market refers to the doubles tennis match between Opitz/Wessels and Papa/Zheng in the Tampere, originally scheduled for July 21, 2026 at 4:00AM ET. This market will resolve to 'Opitz/Wessels' if the team of Opitz/Wessels advances against Papa/Zheng. This market will resolve to 'Papa/Zheng' if the team of Papa/Zheng advances against Opitz/Wessels. 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 Opitz/Wessels and Papa/Zheng in the Tampere, originally scheduled for July 21, 2026 at 4:00AM ET. This market will resolve to 'Opitz/Wessels' if the team of Opitz/Wessels advances against Papa/Zheng. This market will resolve to 'Papa/Zheng' if the team of Papa/Zheng advances against Opitz/Wessels. 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 odds to balance their book and manage risk, while prediction markets allow traders to set prices through continuous buying and selling. This market aggregates the collective belief of traders, which may differ from traditional sportsbook pricing. Comparing the two can reveal where one venue perceives greater or lesser probability than the other, though both aim to reflect the true likelihood of the outcome.
On Polymarket, this market is priced through an automated market maker mechanism where traders buy and sell shares representing each outcome. On Polymarket, prices reflect that venue's order book, liquidity, and how traders price the outcome right now. The current price of each outcome reflects the ratio of shares held in the pool, with prices adjusting dynamically as trades occur. Higher trading volume typically narrows spreads and improves price accuracy. Traders profit by buying undervalued outcomes and selling overvalued ones, which naturally drives prices toward their true probability over time.
This market resolves around Jul 28, 2026, once the match concludes and the result is verifiable from credible public reporting. The outcome will be confirmed based on the official match result, ensuring accuracy and fairness for all traders. Until that time, prices may fluctuate as new information emerges or as traders adjust their positions. Early resolution is possible if the match is cancelled or postponed under specific conditions, though standard resolution follows the final score.
Several factors could shift trader sentiment before resolution. Player injuries, withdrawals, or lineup changes announced before the match could trigger significant repricing. Recent form, head-to-head records, and court conditions at the venue may influence confidence in either pairing. News about player fitness or motivation could also sway the market. As the match date approaches, late-breaking developments and expert commentary often drive volume and volatility, so monitoring sports news and player updates is valuable for traders.