TOTAL VOLUME:
$154.7b
24H VOL:
$279,496,801
24H TRANSACTIONS:
2,984,640,614
OPEN INTEREST:
$1,923,931,766
416,910
Markets across
40,107
events
MATCHED EVENTS:
4,571
PLATFORM COVERAGE:
5
Polymarket:
37%
VS.
Kalshi:
63%
Closed: Oct 13, 10:59 AM EST
Polymarket
This market refers to the tennis match between Mario Arce Fernandez and Sebastian Heinrich in the M15 Monastir, Qualifying, originally scheduled for October 13, 2026 at 5:30AM ET. This market will resolve to 'Mario Arce Fernandez' if Mario Arce Fernandez advances against Sebastian Heinrich. This market will resolve to 'Sebastian Heinrich' if Sebastian Heinrich advances against Mario Arce Fernandez. If the match is canceled (not played at all), ends in a tie, or a winner has not been determined by October 27, 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 Mario Arce Fernandez and Sebastian Heinrich in the M15 Monastir, Qualifying, originally scheduled for October 13, 2026 at 5:30AM ET. This market will resolve to 'Mario Arce Fernandez' if Mario Arce Fernandez advances against Sebastian Heinrich. This market will resolve to 'Sebastian Heinrich' if Sebastian Heinrich advances against Mario Arce Fernandez. If the match is canceled (not played at all), ends in a tie, or a winner has not been determined by October 27, 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 reflect a wisdom-of-the-crowd perspective, often differing from initial sportsbook offerings. Sportsbooks set lines to balance action and incorporate a profit margin, while this market allows traders to express their own independent assessments. If a significant number of informed bettors believe a sportsbook’s odds are inaccurate, they can trade against it on Polymarket, driving the prediction market price towards their collective view. This can result in prediction market probabilities being more accurate, especially as the event approaches, though discrepancies can still occur.
On Polymarket, this market is priced through a continuous auction mechanism where traders buy and sell shares representing their belief in each outcome. The price of a share directly corresponds to the implied probability of that outcome occurring. As more traders buy shares in a particular player, the price of those shares increases, and the implied probability rises. On Polymarket, prices reflect that venue's order book, liquidity, and how traders price the outcome right now. The market’s price reflects the aggregate sentiment of all participants, creating a dynamic and real-time assessment of the potential winner of the Monastir tennis match.
This market resolves around Oct 20, 2026, with the outcome confirmed once the event is verifiable from credible public reporting. Resolution will be based on the official result of the Monastir tennis match between Mario Arce Fernandez and Sebastian Heinrich, as declared by the official tournament organizers. The player who wins the match will be considered the winning outcome for this market. Any potential protests or disputes will be considered based on the official tournament ruling to ensure a fair and accurate resolution.
Several factors could influence trading activity and shift probabilities in this market. News regarding player injuries, changes in playing surface conditions, or even weather forecasts could all impact trader sentiment. Unexpected results in earlier rounds of the tournament, or even comments from analysts regarding player form, could also lead to significant price movements. Any updates related to the players’ recent performance or potential advantages could drive volume and change the perceived likelihood of either player winning the Monastir tennis match.