Chengdu Open, Qualification: Alexandre Muller vs Petr Bar Biryukov

Kalshi — primary rule

If Alexandre Muller wins the Muller vs Bar Biryukov professional tennis match in the 2026 ATP Chengdu 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 Alexandre Muller and Petr Bar Biryukov in the Chengdu Open, Qualification, originally scheduled for September 23, 2026 at 1:00AM ET. This market will resolve to 'Alexandre Muller' if Alexandre Muller advances against Petr Bar Biryukov. This market will resolve to 'Petr Bar Biryukov' if Petr Bar Biryukov advances against Alexandre Muller. If the match is canceled (not played at all), ends in a tie, or a winner has not been determined by October 7, 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 ATP Tour. A consensus of credible reporting may also be used.