TOTAL VOLUME:
$154.4b
24H VOL:
$245,801,863
24H TRANSACTIONS:
2,984,028,936
OPEN INTEREST:
$1,902,097,102
417,059
Markets across
40,178
events
MATCHED EVENTS:
4,415
PLATFORM COVERAGE:
5
Polymarket:
37%
VS.
Kalshi:
63%
Closed: Oct 25, 3:24 PM EST
Polymarket
This market refers to the tennis match between Ryan Nijboer and Mariano Kestelboim in the Guayaquil, Ecuador, Qualifying, originally scheduled for October 25, 2026 at 11:00AM ET. This market will resolve to 'Ryan Nijboer' if Ryan Nijboer advances against Mariano Kestelboim. This market will resolve to 'Mariano Kestelboim' if Mariano Kestelboim advances against Ryan Nijboer. If the match is canceled (not played at all), ends in a tie, or a winner has not been determined by November 8, 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 ATP Tour. A consensus of credible reporting may also be used.
This market refers to the tennis match between Ryan Nijboer and Mariano Kestelboim in the Guayaquil, Ecuador, Qualifying, originally scheduled for October 25, 2026 at 11:00AM ET. This market will resolve to 'Ryan Nijboer' if Ryan Nijboer advances against Mariano Kestelboim. This market will resolve to 'Mariano Kestelboim' if Mariano Kestelboim advances against Ryan Nijboer. If the match is canceled (not played at all), ends in a tie, or a winner has not been determined by November 8, 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 ATP Tour. A consensus of credible reporting may also be used.
Often, prediction market odds reflect a different perspective than those found at traditional sportsbooks. Sportsbooks typically incorporate a 'vig' or commission into their odds, representing their profit margin. This market, driven by the collective intelligence of traders on Polymarket, aims to represent the true probability of an outcome, though biases can still exist. Discrepancies can arise due to differing information access, analytical approaches, or simply varying levels of public interest in the Nijboer vs Kestelboim match. Comparing these odds can reveal where the 'wisdom of the crowd' diverges from professional oddsmakers.
On Polymarket, this market is priced through a continuous auction mechanism where traders buy and sell shares representing their belief in the outcome of the Nijboer vs Kestelboim match. The price of these shares directly reflects the implied probability of that outcome. On Polymarket, prices reflect that venue's order book, liquidity, and how traders price the outcome right now. As more traders participate and new information becomes available, the price fluctuates, providing a real-time assessment of the market's expectations. The market's price is determined solely by supply and demand within Polymarket and is not influenced by external factors or opinions.
This market resolves around Nov 1, 2026, with the outcome confirmed once the event is verifiable from credible public reporting. Resolution will be based on the official result of the Nijboer vs Kestelboim match, as determined by the governing body of the sport. The platform will verify the result against publicly available and trusted sources to ensure accuracy and fairness. Traders who correctly predicted the outcome will be entitled to a payout based on the final market price at the time of resolution. The timing is subject to potential delays in official result reporting.
Several factors could influence the trading activity in this market before Nov 1, 2026. News regarding player injuries, changes in playing conditions, or even significant shifts in public opinion could all impact the perceived probability of either player winning the Nijboer vs Kestelboim match. Unexpected announcements related to the event, such as venue changes or rule modifications, could also trigger price movements. Any information that alters the assessment of each player's chances will likely be reflected in the market price as traders adjust their positions.