This market refers to the tennis match between Daniel Merida Aguilar and Marin Cilic in the Cincinnati Open, originally scheduled for August 13, 2026 at 10:00AM ET. This market will resolve to 'Daniel Merida Aguilar' if Daniel Merida Aguilar advances against Marin Cilic. This market will resolve to 'Marin Cilic' if Marin Cilic advances against Daniel Merida Aguilar. 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.