This market refers to the tennis match between Antonia Ruzic and Kayla Day in the Japan Women's Open, originally scheduled for October 21, 2026 at 9:00PM ET. This market will resolve to 'Antonia Ruzic' if Antonia Ruzic advances against Kayla Day. This market will resolve to 'Kayla Day' if Kayla Day advances against Antonia Ruzic. If the match is canceled (not played at all), ends in a tie, or a winner has not been determined by November 4, 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 WTA Tour. A consensus of credible reporting may also be used.