TOTAL VOLUME:
$134.2b
24H VOL:
$130,522,377
24H TRANSACTIONS:
2,388,728,490
OPEN INTEREST:
$1,438,389,636
404,028
Markets across
30,214
events
MATCHED EVENTS:
2,681
PLATFORM COVERAGE:
5
Polymarket:
39%
VS.
Kalshi:
61%
Closed: Jul 20, 5:00 AM EST
Polymarket
This market refers to the tennis match between Valentini Grammatikopoulou and Alycia Parks in the Athens Open, originally scheduled for July 13, 2026 at 5:00AM ET. This market will resolve to 'Valentini Grammatikopoulou' if Valentini Grammatikopoulou advances against Alycia Parks. This market will resolve to 'Alycia Parks' if Alycia Parks advances against Valentini Grammatikopoulou. 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 Valentini Grammatikopoulou and Alycia Parks in the Athens Open, originally scheduled for July 13, 2026 at 5:00AM ET. This market will resolve to 'Valentini Grammatikopoulou' if Valentini Grammatikopoulou advances against Alycia Parks. This market will resolve to 'Alycia Parks' if Alycia Parks advances against Valentini Grammatikopoulou. 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.
Prediction market odds and sportsbook odds often diverge because they reflect different pricing models. Sportsbooks set lines to balance their book and manage risk, while prediction markets aggregate trader beliefs in real time. For this market, comparing the current prediction market price to major sportsbook lines can reveal whether one venue perceives a significant edge. Traders often use this gap as a signal to identify undervalued or overvalued outcomes relative to consensus.
On Polymarket, this market is priced through an automated market maker that converts trader activity into real-time odds. On Polymarket, prices reflect that venue's order book, liquidity, and how traders price the outcome right now. Shares representing each outcome trade continuously, and the price of each share reflects the collective probability assigned by all active traders. As more capital flows into one outcome, its price rises and the competing outcome's price falls, ensuring the market stays balanced and responsive to new information.
This market resolves around Jul 20, 2026, once the Athens Open match between the two players concludes. The outcome is confirmed when the result becomes verifiable from credible public sources covering professional tennis. At that point, shares representing the winning player are redeemed at full value, and shares for the losing player expire worthless. Early traders can exit their positions at any time before resolution by selling shares at the current market price.
Several factors may shift odds before the match takes place. Recent tournament results, player rankings, head-to-head records, and injury reports can all influence trader confidence. Court surface preference, weather conditions on match day, and pre-match commentary from analysts may also trigger price swings. Additionally, any changes in player seeding, draw position, or late withdrawals could prompt rapid repricing. Monitoring sports news and player social media can help you anticipate moves in this market.