This market refers to the doubles tennis match between Hsieh/Ostapenko and Mertens/Zhang in the WTA Finals Doubles, Group 1, originally scheduled for November 10, 2026 at 1:00PM ET. This market will resolve to 'Hsieh/Ostapenko' if the team of Hsieh/Ostapenko advances against Mertens/Zhang. This market will resolve to 'Mertens/Zhang' if the team of Mertens/Zhang advances against Hsieh/Ostapenko. If the match is canceled (not played at all), ends in a tie, or a winner has not been determined by November 24, 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 team advances due to the opponent's retirement, default, or disqualification, this market will resolve to the team who advances. If the match ends in a walkover (a team 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.