Safiullin vs Bu — Roman Safiullin

Kalshi — primary rule

If Roman Safiullin wins the Safiullin vs Bu professional tennis match in the 2026 ATP Hangzhou Quarterfinal after a ball has been played, then the market resolves to Yes.

Polymarket — resolution criteria

This market refers to the tennis match between Roman Safiullin and Yunchaokete Bu in the Hangzhou Open, originally scheduled for September 27, 2026 at 4:30AM ET. This market will resolve to 'Roman Safiullin' if Roman Safiullin advances against Yunchaokete Bu. This market will resolve to 'Yunchaokete Bu' if Yunchaokete Bu advances against Roman Safiullin. If the match is canceled (not played at all), ends in a tie, or a winner has not been determined by October 11, 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.