Yamaguchi vs Okamura — Mei Yamaguchi

Kalshi — primary rule

If Mei Yamaguchi wins the Yamaguchi vs Okamura professional tennis match in the 2026 WTA Singapore Qualification Final after a ball has been played, then the market resolves to Yes.

Polymarket — resolution criteria

This market refers to the tennis match between Mei Yamaguchi and Kyoka Okamura in the Singapore Open, Qualification, originally scheduled for September 20, 2026 at 1:30AM ET. This market will resolve to 'Mei Yamaguchi' if Mei Yamaguchi advances against Kyoka Okamura. This market will resolve to 'Kyoka Okamura' if Kyoka Okamura advances against Mei Yamaguchi. If the match is canceled (not played at all), ends in a tie, or a winner has not been determined by October 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.