Tiburon: Gus Grumet vs Daniil Ostapenkov

This market refers to the tennis match between Gus Grumet and Daniil Ostapenkov in the Tiburon, USA, Qualifying, originally scheduled for September 13, 2026 at 4:30PM ET. This market will resolve to 'Gus Grumet' if Gus Grumet advances against Daniil Ostapenkov. This market will resolve to 'Daniil Ostapenkov' if Daniil Ostapenkov advances against Gus Grumet. If the match is canceled (not played at all), ends in a tie, or a winner has not been determined by September 27, 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.