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 27, 12:30 PM EST
Polymarket
This market refers to the doubles tennis match between Johnson/Zielinski and Droguet/Jacquet in the Estoril Open, originally scheduled for July 20, 2026 at 12:30PM ET. This market will resolve to 'Johnson/Zielinski' if the team of Johnson/Zielinski advances against Droguet/Jacquet. This market will resolve to 'Droguet/Jacquet' if the team of Droguet/Jacquet advances against Johnson/Zielinski. 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 Johnson/Zielinski and Droguet/Jacquet in the Estoril Open, originally scheduled for July 20, 2026 at 12:30PM ET. This market will resolve to 'Johnson/Zielinski' if the team of Johnson/Zielinski advances against Droguet/Jacquet. This market will resolve to 'Droguet/Jacquet' if the team of Droguet/Jacquet advances against Johnson/Zielinski. 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 serve different purposes and operate under different constraints. Sportsbooks set odds to balance their liability and profit margin, while prediction markets reflect pure trader consensus without a built-in spread. Prediction markets typically aggregate dispersed information more efficiently over time, sometimes pricing outcomes differently than traditional sportsbooks. However, sportsbooks may move faster on breaking news due to dedicated risk management teams. Comparing this market's odds to major sportsbooks can reveal whether traders are pricing the outcome more optimistically or pessimistically than the betting public.
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 price of each share reflects the probability assigned by the market at any given moment. As traders place orders, the price adjusts automatically based on supply and demand. Shares can be held until resolution or sold at any time before the event concludes. The current odds represent the equilibrium price where buyers and sellers meet, and this price updates in real time as new trades execute.
This market resolves around Jul 27, 2026, once the Estoril Open doubles final has concluded and the result is verifiable from credible public sources. The outcome is determined by which team wins the match. Traders who hold shares in the winning outcome receive their payout, while shares in the losing outcome expire worthless. Resolution typically occurs within hours of the final match completion, after official confirmation is available. Early resolution is possible if one team withdraws or the match is cancelled under tournament rules.
Several factors could shift odds before Jul 27, 2026. Player injuries or withdrawal announcements would trigger sharp repricing, as would changes in seeding or bracket positioning. Recent form updates, head-to-head records, and surface-specific performance data often influence trader sentiment. Weather forecasts for the tournament location may affect playing conditions and player performance expectations. Media coverage highlighting one team's momentum or a player's confidence could drive incremental buying or selling. Late-breaking news about coaching changes, equipment issues, or off-court circumstances may also move the market as traders reassess probabilities.