This market refers to the tennis match between Zdenek Kolar and Zhizhen Zhang in the Oeiras 4, originally scheduled for May 12, 2026 at 10:30AM ET. This market will resolve to 'Zdenek Kolar' if Zdenek Kolar advances against Zhizhen Zhang. This market will resolve to 'Zhizhen Zhang' if Zhizhen Zhang advances against Zdenek Kolar. 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.