Katie Boulter vs Marta Kostyuk — San Diego Final
UKR6
Boulter K.
Katie Boulter defeated Marta Kostyuk 5-7 6-2 6-2 in the San Diego final on hard. The upset overturned the form book — Marta Kostyuk came in ranked #11, leading the head-to-head 1–0, defending last year's round of 16. Katie Boulter claimed a first win over Marta Kostyuk in two meetings, narrowing the head-to-head to 1–1.
Key context
- Match story: Katie Boulter dropped the opening set before beating Marta Kostyuk 5–7 6–2 6–2.
Head to head
0–1| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2025-08-25 | US Open | R128 | hard | Marta Kostyuk | 6-4 6-4 |
Serve vs return
This seasonEach player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. About
Serve & return on hard
Per-surface Serve / Return Rating (0–100, percentile within the hard field, opponent-adjusted over 52 weeks). About
Statistics
This seasonAverages over each player's completed matches in the selected window (118 vs 117). ATP, WTA & Challenger.
Clutch
Under pressurePerformance in the biggest moments — break points, deciding sets and tiebreaks (0–100, higher is better). About
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 loadBoulter K.: 14 days rest · 1 match (14d) · Kostyuk M.: 5 days rest · 2 matches, 37 games (7d). Higher means fresher. About