This market refers to the tennis match between Alvaro Guillen Meza and Josip Simundza in the Zagreb, originally scheduled for May 11, 2026 at 4:00AM ET. This market will resolve to 'Alvaro Guillen Meza' if Alvaro Guillen Meza advances against Josip Simundza. This market will resolve to 'Josip Simundza' if Josip Simundza advances against Alvaro Guillen Meza. If the match is canceled (not played at all), ends in a tie, or is delayed beyond 7 days from the scheduled date without a winner determined, 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.