

Marta Kostyuk defeated Mirra Andreeva 6-3 7-5 in the Madrid final on clay. The upset overturned the form book — Mirra Andreeva came in ranked #5, defending last year's round of 16. Marta Kostyuk extended the head-to-head to 3–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2026-08-19 | Cincinnati | R16 | hard | Marta Kostyuk | 4-6 6-0 6-2 |
| 2026-06-04 | Roland Garros | SF | clay | Mirra Andreeva | 1-6 3-6 |
| 2026-01-04 | Brisbane | QF | hard | Marta Kostyuk | 7-6 6-3 |
Averages over each player's completed matches in the selected window (31 vs 45). ATP, WTA & Challenger.
Performance in the biggest moments — break points, deciding sets and tiebreaks (0–100, higher is better). About
Kostyuk M.: 7 days rest · 1 match, 16 games (7d) · Andreeva M.: 10 days rest · 3 matches (14d). 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 clay field, opponent-adjusted over 52 weeks). About