TOTAL VOLUME:
$134.2b
24H VOL:
$126,590,312
24H TRANSACTIONS:
2,388,728,490
OPEN INTEREST:
$1,439,516,703
404,175
Markets across
30,277
events
MATCHED EVENTS:
2,685
PLATFORM COVERAGE:
5
Polymarket:
39%
VS.
Kalshi:
61%
Closed: Sep 1, 11:00 PM EST
Polymarket
This market refers to the tennis match between Naoya Honda and Seiya Nakanishi in the M25 Urayasu, Main Draw, originally scheduled for September 1, 2026 at 9:00PM ET. This market will resolve to 'Naoya Honda' if Naoya Honda advances against Seiya Nakanishi. This market will resolve to 'Seiya Nakanishi' if Seiya Nakanishi advances against Naoya Honda. If the match is canceled (not played at all), ends in a tie, or a winner has not been determined by September 15, 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 Naoya Honda and Seiya Nakanishi in the M25 Urayasu, Main Draw, originally scheduled for September 1, 2026 at 9:00PM ET. This market will resolve to 'Naoya Honda' if Naoya Honda advances against Seiya Nakanishi. This market will resolve to 'Seiya Nakanishi' if Seiya Nakanishi advances against Naoya Honda. If the match is canceled (not played at all), ends in a tie, or a winner has not been determined by September 15, 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.
On Polymarket, prices reflect that venue's order book, liquidity, and how traders price the outcome right now. On Polymarket, traders manually set prices through buying and selling shares, creating a dynamic market price that reflects their collective view of who will win. The top outcome’s current implied chance shows what most participants expect at that moment. Liquidity levels depend on trading volume of $796, and price swings can happen quickly when new information emerges — such as injuries or weather updates — because there’s no central bookmaker adjusting the odds.
This market resolves around Sep 9, 2026, with the outcome confirmed once the event is verifiable from credible public reporting. The result will be determined by the official match result — who is declared the winner after all regulation time and any applicable tie-breaking procedures. Once the match concludes and results are widely reported, Polymarket will finalize the market based on those authoritative sources, ensuring traders know exactly when their positions will be settled.
Injuries, weather delays, or changes to the players’ form can all shift this market as the match nears. Media interviews, practice performance leaks, and betting trends on Polymarket may cause price swings, especially if one competitor appears favored or hindered. Any last-minute news — such as a surprise lineup change or pitch conditions — could also move the implied odds dramatically, so traders watch official announcements and live updates closely in the days leading to Sep 9, 2026.