TOTAL VOLUME:
$134b
24H VOL:
$107,351,958
24H TRANSACTIONS:
2,388,728,490
OPEN INTEREST:
$1,416,970,024
400,720
Markets across
30,097
events
MATCHED EVENTS:
2,633
PLATFORM COVERAGE:
5
Polymarket:
39%
VS.
Kalshi:
61%
Closed: Jul 19, 10:00 AM EST
Polymarket
This event group concerns a women's tennis qualification match between Lilli Tagger and Madison Sieg at the Athens Open, originally scheduled for July 12, 2026 at 10:00 AM ET. The group contains three related markets: a head-to-head winner market, and a separate binary market on whether the match is completed under normal play rules.
This market refers to the tennis match between Lilli Tagger and Madison Sieg in the Athens Open, Qualification, originally scheduled for July 12, 2026 at 10:00AM ET. This market will resolve to 'Lilli Tagger' if Lilli Tagger advances against Madison Sieg. This market will resolve to 'Madison Sieg' if Madison Sieg advances against Lilli Tagger. 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 WTA Tour. A consensus of credible reporting may also be used.
This market refers to the tennis match between Jannik Sinner and Alexander Zverev in the Wimbledon ATP, originally scheduled for July 12, 2026 at 11:00AM ET. This market will resolve to 'Jannik Sinner' if Jannik Sinner advances against Alexander Zverev. This market will resolve to 'Alexander Zverev' if Alexander Zverev advances against Jannik Sinner. 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 ATP Tour. A consensus of credible reporting may also be used.
Prediction markets and sportsbooks price events differently because they serve different audiences and operate under different constraints. Sportsbooks set odds to balance their book and manage risk, often incorporating a margin. Prediction markets, by contrast, are peer-to-peer exchanges where traders themselves set prices through supply and demand. This market-driven mechanism can sometimes reflect sharper or more current information, especially when new data emerges between sportsbook updates. Comparing the two can reveal where professional oddsmakers and decentralized traders diverge on this qualifier.
Polymarket and Predict can show different implied probabilities for the same outcome because of liquidity, fee structure, participant mix, and how each venue defines the contract. Each platform attracts different trader demographics, liquidity levels, and information flows, which can lead to temporary price gaps on the same event. Polymarket and Predict may also have different fee structures, user bases, or settlement rules that influence how traders value outcomes. Additionally, one venue may receive breaking news or injury updates before the other, or traders on one platform may have stronger conviction based on their own research. These differences typically narrow as the match approaches and information becomes more widely known.
Key catalysts include recent head-to-head performance, current form and ranking points, injury reports or player fitness updates, and court surface conditions at the Athens venue. Betting action from professional traders or sharp money can also shift odds quickly if new information emerges. Pre-match commentary from tennis analysts, withdrawal announcements, or changes to seeding may influence trader conviction. Weather delays or scheduling adjustments could affect player momentum. Monitor official ATP communications and reliable tennis news sources for updates that might reshape expectations before the qualifier takes place.