Japan Women's Open, Qualification: Sayaka Ishii vs Elina Avanesyan

Kalshi — primary rule

If Sayaka Ishii wins the Ishii vs Avanesyan professional tennis match in the 2026 WTA Osaka Qualification Round 1 after a ball has been played, then the market resolves to Yes.

Polymarket — resolution criteria

This market refers to the tennis match between Sayaka Ishii and Elina Avanesyan in the Japan Women's Open, Qualification, originally scheduled for October 16, 2026 at 10:30PM ET. This market will resolve to 'Sayaka Ishii' if Sayaka Ishii advances against Elina Avanesyan. This market will resolve to 'Elina Avanesyan' if Elina Avanesyan 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 30, 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.