This market refers to the tennis match between Abedallah Shelbayh and Daniil Ostapenkov in the Columbus, originally scheduled for September 30, 2026 at 10:00AM ET. This market will resolve to 'Abedallah Shelbayh' if Abedallah Shelbayh advances against Daniil Ostapenkov. This market will resolve to 'Daniil Ostapenkov' if Daniil Ostapenkov advances against Abedallah Shelbayh. If the match is canceled (not played at all), ends in a tie, or a winner has not been determined by October 14, 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.