This market refers to the tennis match between Ryan Augusto dos Santos and Mateus Napoli da Silveira in the M15 Leme (moved from Sao Luis), Main Draw, originally scheduled for September 9, 2026 at 10:00AM ET. This market will resolve to 'Ryan Augusto dos Santos' if Ryan Augusto dos Santos advances against Mateus Napoli da Silveira. This market will resolve to 'Mateus Napoli da Silveira' if Mateus Napoli da Silveira advances against Ryan Augusto dos Santos. If the match is canceled (not played at all), ends in a tie, or a winner has not been determined by September 23, 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.