This market refers to the tennis match between Pedro Vives Marcos and Eduardo Ribeiro in the Porto, originally scheduled for September 1, 2026 at 10:00AM ET. This market will resolve to 'Pedro Vives Marcos' if Pedro Vives Marcos advances against Eduardo Ribeiro. This market will resolve to 'Eduardo Ribeiro' if Eduardo Ribeiro advances against Pedro Vives Marcos. If the match is canceled (not played at all), ends in a tie, or a winner has not been determined by September 15, 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.