TOTAL VOLUME:
$134.1b
24H VOL:
$113,466,932
24H TRANSACTIONS:
2,388,728,490
OPEN INTEREST:
$1,423,222,590
402,751
Markets across
30,217
events
MATCHED EVENTS:
2,632
PLATFORM COVERAGE:
5
Polymarket:
39%
VS.
Kalshi:
61%
Closed: Aug 26, 7:04 PM EST
Polymarket
This market refers to the tennis match between Kei Nishikori and Michael Antonius in the US Open, Qualification ATP, originally scheduled for August 26, 2026 at 11:00AM ET. This market will resolve to 'Kei Nishikori' if Kei Nishikori advances against Michael Antonius. This market will resolve to 'Michael Antonius' if Michael Antonius advances against Kei Nishikori. If the match is canceled (not played at all), ends in a tie, or a winner has not been determined by September 9, 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 Kei Nishikori and Michael Antonius in the US Open, Qualification ATP, originally scheduled for August 26, 2026 at 11:00AM ET. This market will resolve to 'Kei Nishikori' if Kei Nishikori advances against Michael Antonius. This market will resolve to 'Michael Antonius' if Michael Antonius advances against Kei Nishikori. If the match is canceled (not played at all), ends in a tie, or a winner has not been determined by September 9, 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 resolves around Sep 2, 2026, with the outcome confirmed once the event is verifiable from credible public reporting. The result is determined by the official match conclusion, and the platform will update the market accordingly based on confirmed scores from accepted sports authorities.
Injuries, weather delays, or recent match performance for either player can shift this market as the event nears. Media updates, betting trends, and any last-minute changes to player availability may cause traders to adjust their positions, impacting odds. High volume spikes — such as $177,374 over a short period — often signal new information driving rapid price changes before the match begins.