Japan Women's Open: Katie Boulter vs Antonia Ruzic

Kalshi — primary rule

If Katie Boulter wins the Boulter vs Ruzic professional tennis match in the 2026 WTA Osaka Quarterfinal after a ball has been played, then the market resolves to Yes.

Polymarket — resolution criteria

This market refers to the tennis match between Katie Boulter and Antonia Ruzic in the Japan Women's Open, originally scheduled for October 22, 2026 at 9:00PM ET. This market will resolve to 'Katie Boulter' if Katie Boulter advances against Antonia Ruzic. This market will resolve to 'Antonia Ruzic' if Antonia Ruzic advances against Katie Boulter. If the match is canceled (not played at all), ends in a tie, or a winner has not been determined by November 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 WTA Tour. A consensus of credible reporting may also be used.