Marta Kostyuk vs Sloane Stephens — Cincinnati Round of 32
UKR10
USAWC
Kostyuk M.
Marta Kostyuk defeated Sloane Stephens in the Round of 32 at the Cincinnati tournament, winning 7-5, 7-5 on hard courts. Kostyuk hit 7 aces to Stephens' 0 and converted 67% of her break points, compared to Stephens' 44%. Kostyuk won the match with 6 service breaks to Stephens' 4.
Around the match
“When the draw came out, I was like 'I could not ask for a better draw.' Just having this incredible experience, and the crowd was very tough.”
Kostyuk M.WTA Tennis ↗“I hit with her at Wimbledon, and she was just different. It was so nice. It was really awesome to hit with her and get to know her as much as I could while training together.”
Kostyuk M.Tennishead ↗
Quotes belong to their sources, linked above.
Key context
- Match story: Marta Kostyuk edged Sloane Stephens in two tight sets (7–5 7–5).
Head to head
No previous meetings on record.
Statistics
This seasonAverages over each player's completed matches in the selected window (32 vs 24). ATP, WTA & Challenger.
Clutch
Under pressurePerformance in the biggest moments — break points, deciding sets and tiebreaks (0–100, higher is better). About
Win Probability
Pre-match · updated 18:50 UTC50–58%
58–67%
67–80%
80%+
Strong favourite · Kostyuk M. heavily favoured
Calibrated model · 65% favourite accuracy (2025–26, out-of-sample). Probability is a statistical estimate, not a certainty. How it works.
Umpiry Score
Pre-matchThe Umpiry Score combines match-context factors — matchup, form, fatigue, travel and motivation — into a single 0–10 score, updated daily. Read how it works.
Freshness
Recent loadKostyuk M.: 1 day rest · 2 matches, 55 games (7d) · Stephens S.: 1 day rest · 4 matches, 81 games (7d). Higher means fresher. About