This market refers to the tennis match between Petr Bar Biryukov and Jie Cui in the Astana, originally scheduled for August 12, 2026 at 1:00AM ET. This market will resolve to 'Petr Bar Biryukov' if Petr Bar Biryukov advances against Jie Cui. This market will resolve to 'Jie Cui' if Jie Cui advances against Petr Bar Biryukov. 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.