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 9, 6:00 AM EST
Polymarket
This market refers to the tennis match between Sandra Samir and Linea Bajraliu in the ITF Women Amstelveen, originally scheduled for July 2, 2026 at 6:00AM ET. This market will resolve to 'Sandra Samir' if Sandra Samir advances against Linea Bajraliu. This market will resolve to 'Linea Bajraliu' if Linea Bajraliu advances against Sandra Samir. 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 International Tennis Federation (ITF). A consensus of credible reporting may also be used.
This market refers to the tennis match between Sandra Samir and Linea Bajraliu in the ITF Women Amstelveen, originally scheduled for July 2, 2026 at 6:00AM ET. This market will resolve to 'Sandra Samir' if Sandra Samir advances against Linea Bajraliu. This market will resolve to 'Linea Bajraliu' if Linea Bajraliu advances against Sandra Samir. 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 International Tennis Federation (ITF). 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 book and manage risk, incorporating their own margins. Prediction markets, by contrast, aggregate the collective beliefs of many independent traders with real money at stake, which can surface insights that traditional oddsmakers miss. This market's odds reflect pure trader sentiment without a built-in margin, though both venues ultimately aim to forecast the same underlying event outcome.
On Polymarket, traders set the odds through an automated market maker that adjusts prices based on buy and sell pressure. On Polymarket, prices reflect that venue's order book, liquidity, and how traders price the outcome right now. The current probability estimate reflects the balance between those willing to back each player, with prices moving in real time as new information or sentiment emerges. Shares are priced between 0 and 1 cent, and the sum of all outcome prices always equals 1 dollar, ensuring internal consistency and allowing traders to hedge or express nuanced views on the match.
This market resolves around Jul 9, 2026, once the ITF Amstelveen match between the two players concludes and the result is verified against credible public sources. The outcome is determined by who wins the match according to official tournament records. Until that point, prices will fluctuate based on pre-match analysis, player form, injuries, and other factors that traders believe affect the likelihood of each outcome.
Several factors could shift trader sentiment before the match takes place. Injury reports or withdrawal announcements involving either player would trigger sharp repricing. Recent tournament results, head-to-head records, and surface-specific performance data often influence positions as the event approaches. Court conditions, weather forecasts, and any last-minute lineup changes could also prompt trading activity. Additionally, broader shifts in how traders assess each player's form or confidence may gradually move the odds in either direction leading up to the match.