W50 Nanao: Sayaka Ishii vs Rira Kosaka

This market refers to the tennis match between Sayaka Ishii and Rira Kosaka in the W50 Nanao, Qualifying, originally scheduled for September 21, 2026 at 10:00PM ET. This market will resolve to 'Sayaka Ishii' if Sayaka Ishii advances against Rira Kosaka. This market will resolve to 'Rira Kosaka' if Rira Kosaka advances against Sayaka Ishii. If the match is canceled (not played at all), ends in a tie, or a winner has not been determined by October 5, 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 International Tennis Federation (ITF). A consensus of credible reporting may also be used.