This market refers to the tennis match between Keisuke Saitoh and Koki Matsuda in the Jingshan, China, Qualifying, originally scheduled for September 28, 2026 at 2:10AM ET. This market will resolve to 'Keisuke Saitoh' if Keisuke Saitoh advances against Koki Matsuda. This market will resolve to 'Koki Matsuda' if Koki Matsuda 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 October 12, 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.