This market refers to the tennis match between Frances Tiafoe and Marin Cilic in the National Bank Open, originally scheduled for August 4, 2026 at 7:00PM ET. This market will resolve to 'Frances Tiafoe' if Frances Tiafoe advances against Marin Cilic. This market will resolve to 'Marin Cilic' if Marin Cilic advances against Frances Tiafoe. 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.