Sao Paulo Open: Mary Stoiana vs Claire Liu

Kalshi — primary rule

If Mary Stoiana wins the Stoiana vs Liu professional tennis match in the 2026 WTA Sao Paulo Round Of 32 after a ball has been played, then the market resolves to Yes.

Polymarket — resolution criteria

This market refers to the tennis match between Mary Stoiana and Claire Liu in the Sao Paulo Open, originally scheduled for September 14, 2026 at 9:00AM ET. This market will resolve to 'Mary Stoiana' if Mary Stoiana advances against Claire Liu. This market will resolve to 'Claire Liu' if Claire Liu advances against Mary Stoiana. If the match is canceled (not played at all), ends in a tie, or a winner has not been determined by September 28, 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.