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: Sep 21, 5:52 PM EST
Polymarket
This market refers to the tennis match between Katja Wiersholm and Berta Passola in the W50 Berkeley, CA, Qualifying, originally scheduled for September 21, 2026 at 2:00PM ET. This market will resolve to 'Katja Wiersholm' if Katja Wiersholm advances against Berta Passola. This market will resolve to 'Berta Passola' if Berta Passola advances against Katja Wiersholm. If the match is canceled (not played at all), ends in a tie, or a winner has not been determined by October 5, 2026, 11:59 PM ET (14 days after the scheduled start), 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 Katja Wiersholm and Berta Passola in the W50 Berkeley, CA, Qualifying, originally scheduled for September 21, 2026 at 2:00PM ET. This market will resolve to 'Katja Wiersholm' if Katja Wiersholm advances against Berta Passola. This market will resolve to 'Berta Passola' if Berta Passola advances against Katja Wiersholm. If the match is canceled (not played at all), ends in a tie, or a winner has not been determined by October 5, 2026, 11:59 PM ET (14 days after the scheduled start), 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.
Typically, prediction market odds offer a different perspective than those found at traditional sportsbooks. Sportsbooks often incorporate a 'vig' or commission into their odds, which represents their profit margin. This market, driven by the collective wisdom of traders, aims to reflect the true probabilities of the outcome. While sportsbooks may initially set odds based on expert analysis, this market dynamically adjusts as more information becomes available and more people weigh in, potentially leading to more accurate predictions. It’s common to see differences emerge as the event approaches.
On Polymarket, this market is priced through a continuous auction mechanism. Traders buy and sell shares representing their belief in the likelihood of a particular outcome. As more shares are purchased for a given outcome, its price increases, indicating a higher perceived probability. On Polymarket, prices reflect that venue's order book, liquidity, and how traders price the outcome right now. The price of each share directly reflects the market’s consensus view on the probability of that outcome. This dynamic pricing ensures that the market remains responsive to new information and changing opinions among traders. The volume of trading also influences price discovery, providing a clear signal of market interest.
This market resolves around Sep 28, 2026, with the outcome confirmed once the event is verifiable from credible public reporting. The resolution will be based on the official results of the W50 Berkeley tennis match, determining which player ultimately won. The platform will verify the result against established sources for professional tennis matches, ensuring an accurate and reliable outcome. Traders will then be able to claim their winnings based on the final result and their positions in this market.
Several factors could influence the trading activity and price movement in this market. Any news regarding player form, injuries, or changes in playing conditions could significantly impact the perceived probabilities. Unexpected upsets in earlier rounds of the tournament, or even weather forecasts affecting the match schedule, could also drive trading volume and price adjustments. Furthermore, large trades by influential market participants could create short-term volatility, and general shifts in public sentiment surrounding the players involved could also contribute to price changes before Sep 28, 2026.