Cincinnati Open (Doubles): Hsieh/Ostapenko vs Guo/Mladenovic

This market refers to the doubles tennis match between Hsieh/Ostapenko and Guo/Mladenovic in the Cincinnati Open, originally scheduled for August 20, 2026 at 3:00PM ET. This market will resolve to 'Hsieh/Ostapenko' if the team of Hsieh/Ostapenko advances against Guo/Mladenovic. This market will resolve to 'Guo/Mladenovic' if the team of Guo/Mladenovic advances against Hsieh/Ostapenko. If the match is canceled (not played at all), ends in a tie, or is delayed beyond 7 days from the scheduled date without a winner determined, 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.