This market refers to the tennis match between Keisuke Saitoh and Seongchan Hong in the M25 Sapporo, Main Draw, originally scheduled for September 11, 2026 at 10:00PM ET. This market will resolve to 'Keisuke Saitoh' if Keisuke Saitoh advances against Seongchan Hong. This market will resolve to 'Seongchan Hong' if Seongchan Hong advances against Keisuke Saitoh. If the match is canceled (not played at all), ends in a tie, or a winner has not been determined by September 25, 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.