This market refers to the tennis match between Theo Papamalamis and Alex Rybakov in the M25 Norman, OK, Main Draw, originally scheduled for October 28, 2026 at 12:30PM ET. This market will resolve to 'Theo Papamalamis' if Theo Papamalamis advances against Alex Rybakov. This market will resolve to 'Alex Rybakov' if Alex Rybakov advances against Theo Papamalamis. If the match is canceled (not played at all), ends in a tie, or a winner has not been determined by November 11, 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.