This market refers to the tennis match between Ilia Simakin and Hunter Heck in the Phan Thiet 4, originally scheduled for September 18, 2026 at 11:00PM ET. This market will resolve to 'Ilia Simakin' if Ilia Simakin advances against Hunter Heck. This market will resolve to 'Hunter Heck' if Hunter Heck advances against Ilia Simakin. If the match is canceled (not played at all), ends in a tie, or a winner has not been determined by October 2, 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.