This market refers to the tennis match between Zdenek Kolar and Alex Barrena in the Tulln, originally scheduled for September 11, 2026 at 4:00AM ET. This market will resolve to 'Zdenek Kolar' if Zdenek Kolar advances against Alex Barrena. This market will resolve to 'Alex Barrena' if Alex Barrena advances against Zdenek Kolar. If the match is canceled (not played at all), ends in a tie, or a winner has not been determined by September 25, 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.