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 16, 10:31 AM EST
Polymarket
This market refers to the tennis match between Sergio Callejon Hernando and Luca Castagnola in the M15 Monastir, Main Draw, originally scheduled for October 16, 2026 at 6:00AM ET. This market will resolve to 'Sergio Callejon Hernando' if Sergio Callejon Hernando advances against Luca Castagnola. This market will resolve to 'Luca Castagnola' if Luca Castagnola advances against Sergio Callejon Hernando. If the match is canceled (not played at all), ends in a tie, or a winner has not been determined by October 30, 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 Sergio Callejon Hernando and Luca Castagnola in the M15 Monastir, Main Draw, originally scheduled for October 16, 2026 at 6:00AM ET. This market will resolve to 'Sergio Callejon Hernando' if Sergio Callejon Hernando advances against Luca Castagnola. This market will resolve to 'Luca Castagnola' if Luca Castagnola advances against Sergio Callejon Hernando. If the match is canceled (not played at all), ends in a tie, or a winner has not been determined by October 30, 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.
Comparing prediction market odds to sportsbook odds reveals how the wisdom of the crowd differs from professional oddsmakers. Often, prediction markets can offer different probabilities, especially as new information emerges or if the market attracts specialized knowledge. If sportsbook odds suggest a clear favorite, this market might reflect a more nuanced assessment, or conversely, show stronger confidence in the perceived frontrunner. Examining these differences can highlight potential value or inefficiencies in either market.
On Polymarket, this market is priced through a continuous auction mechanism where traders buy and sell shares representing their belief in the outcome. The price of these shares directly reflects the implied probability of that outcome occurring. On Polymarket, prices reflect that venue's order book, liquidity, and how traders price the outcome right now. The market's price fluctuates based on supply and demand, driven by new information and trader sentiment. Higher demand for shares in a particular outcome will drive up its price, increasing its implied probability, while increased selling pressure will have the opposite effect.
This market resolves around Oct 23, 2026, with the outcome confirmed once the event is verifiable from credible public reporting. Resolution will be based on the official result of the Callejon vs Castagnola match as reported by the governing body of M15 Monastir. The platform will verify the result against established sources to determine which outcome is the winner, and shares will be paid out accordingly. Traders should monitor official announcements for the definitive result.
Several signals or events could significantly move this market before resolution. Any news regarding player form, injuries, or changes in strategy for either Callejon or Castagnola would likely impact trading activity. Unexpected upsets in other matches leading up to the event could also shift perceptions of momentum and influence the market. Finally, any public statements from analysts or experts offering predictions could sway trader sentiment and cause price fluctuations in this market.