TOTAL VOLUME:
$134.1b
24H VOL:
$133,388,117
24H TRANSACTIONS:
2,388,728,490
OPEN INTEREST:
$1,436,095,462
405,232
Markets across
30,526
events
MATCHED EVENTS:
2,693
PLATFORM COVERAGE:
5
Polymarket:
39%
VS.
Kalshi:
61%
Closed: Sep 13, 12:46 AM EST
Polymarket
This market refers to the tennis match between Jerry Roddick and Keisuke Saitoh in the M25 Sapporo, Main Draw, originally scheduled for September 12, 2026 at 10:00PM ET. This market will resolve to 'Jerry Roddick' if Jerry Roddick advances against Keisuke Saitoh. This market will resolve to 'Keisuke Saitoh' if Keisuke Saitoh advances against Jerry Roddick. If the match is canceled (not played at all), ends in a tie, or a winner has not been determined by September 26, 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 Jerry Roddick and Keisuke Saitoh in the M25 Sapporo, Main Draw, originally scheduled for September 12, 2026 at 10:00PM ET. This market will resolve to 'Jerry Roddick' if Jerry Roddick advances against Keisuke Saitoh. This market will resolve to 'Keisuke Saitoh' if Keisuke Saitoh advances against Jerry Roddick. If the match is canceled (not played at all), ends in a tie, or a winner has not been determined by September 26, 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 the wisdom of the crowd and can differ from traditional sportsbook odds. Sportsbooks often set initial lines to balance action, while this market allows traders to continuously update their beliefs based on new information. If a significant discrepancy exists between prediction market probabilities and sportsbook odds, it may indicate that the market perceives information differently or has access to unique insights. It’s important to consider both sources when forming your own opinion on the outcome.
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 a share directly reflects the probability of that outcome occurring, as determined by supply and demand. On Polymarket, prices reflect that venue's order book, liquidity, and how traders price the outcome right now. The more traders believe an outcome is likely, the higher the price of its corresponding shares will rise. This creates a dynamic and efficient way to aggregate information and forecast the result of the Roddick vs Saitoh match.
This market resolves around Sep 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 M25 Sapporo match between Jerry Roddick and Keisuke Saitoh, as reported by a recognized sports authority. The platform will verify the result against these sources to determine which outcome is the winner and distribute payouts accordingly. Traders should monitor official sources for the final result to understand the resolution process.
Several factors could influence the price movement of this market before Sep 20, 2026. Any news regarding player form, injuries, or changes in playing conditions could significantly shift trader sentiment. Unexpected announcements about the match schedule or venue could also create volatility. Furthermore, major upsets in other related matches or tournaments might cause traders to reassess their probabilities for the Roddick vs Saitoh match, leading to adjustments in the market price. Monitoring sports news and player updates will be key.