Almaty Open: Stefanos Tsitsipas vs James Duckworth

Kalshi — primary rule

If Stefanos Tsitsipas wins the Tsitsipas vs Duckworth professional tennis match in the 2026 ATP Almaty Quarterfinal after a ball has been played, then the market resolves to Yes.

Polymarket — resolution criteria

This market refers to the tennis match between Stefanos Tsitsipas and James Duckworth in the Almaty Open, originally scheduled for October 23, 2026 at 2:00AM ET. This market will resolve to 'Stefanos Tsitsipas' if Stefanos Tsitsipas advances against James Duckworth. This market will resolve to 'James Duckworth' if James Duckworth advances against Stefanos Tsitsipas. If the match is canceled (not played at all), ends in a tie, or a winner has not been determined by November 6, 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.