This market refers to the tennis match between Khumoun Sultanov and Luca Castelnuovo in the Guangzhou 2, originally scheduled for October 20, 2026 at 12:30AM ET. This market will resolve to 'Khumoun Sultanov' if Khumoun Sultanov advances against Luca Castelnuovo. This market will resolve to 'Luca Castelnuovo' if Luca Castelnuovo advances against Khumoun Sultanov. If the match is canceled (not played at all), ends in a tie, or a winner has not been determined by November 3, 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.