This market refers to the tennis match between Valentin Vacherot and Stefanos Tsitsipas in the Japan Open Tennis Championships, originally scheduled for October 1, 2026 at 11:30PM ET. This market will resolve to 'Valentin Vacherot' if Valentin Vacherot advances against Stefanos Tsitsipas. This market will resolve to 'Stefanos Tsitsipas' if Stefanos Tsitsipas advances against Valentin Vacherot. If the match is canceled (not played at all), ends in a tie, or a winner has not been determined by October 15, 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.