This market refers to the tennis match between Marta Kostyuk and Sloane Stephens in the Cincinnati Open, originally scheduled for August 18, 2026 at 10:00AM ET.
This market will resolve to 'Marta Kostyuk' if Marta Kostyuk advances against Sloane Stephens.
This market will resolve to 'Sloane Stephens' if Sloane Stephens advances against Marta Kostyuk.
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 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 WTA Tour. A consensus of credible reporting may also be used.
Cincinnati Open: Marta Kostyuk vs Sloane Stephens
Sloane Stephens55
Marta Kostyuk76Game context
Marta Kostyuk enters as the clear favorite against Sloane Stephens in the Cincinnati Open round of 32 on outdoor hard courts, with trader consensus reflecting her No. 11 ranking and dominant 2026 form (roughly 30-7 record, including titles in Madrid and Rouen). The Ukrainian has shown strong consistency on hard courts this season, backed by recent wins over quality opponents and a favorable draw path. Stephens, a former US Open champion and 13-time Cincinnati participant, earned her spot via wildcard and notched solid early-round victories, but her 2026 results remain mixed at world No. 240. With no prior head-to-head and Kostyuk's superior recent results and ranking edge, market pricing highlights the significant gap in current form and baseline reliability, though Stephens' experience on the surface offers limited upset potential in a straight-sets contest.
