This market refers to the tennis match between Tristan Boyer and Elmer Moeller in the Lisbon, originally scheduled for October 19, 2026 at 5:00AM ET. This market will resolve to 'Tristan Boyer' if Tristan Boyer advances against Elmer Moeller. This market will resolve to 'Elmer Moeller' if Elmer Moeller advances against Tristan Boyer. If the match is canceled (not played at all), ends in a tie, or a winner has not been determined by November 2, 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.