
Jelena Ostapenko defeated Marta Kostyuk 7-5 6-3 in the Adelaide quarter-final on hard. The upset overturned the form book — Marta Kostyuk came in ranked #11. Jelena Ostapenko extended the head-to-head to 2–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2023-09-18 | Guadalajara | R32 | hard | Jelena Ostapenko | 6-2 6-3 |
Averages over each player's completed matches in the selected window (119 vs 130). ATP, WTA & Challenger.
Performance in the biggest moments — break points, deciding sets and tiebreaks (0–100, higher is better). About
Ostapenko J.: 6 days rest · 1 match, 16 games (7d) · Kostyuk M.: 2 days rest · 3 matches, 79 games (7d). Higher means fresher. About
Each player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. About
Per-surface Serve / Return Rating (0–100, percentile within the hard field, opponent-adjusted over 52 weeks). About