

Marta Kostyuk defeated Mirra Andreeva 7-6 6-3 in the Brisbane quarter-final on hard. The upset overturned the form book — Mirra Andreeva came in ranked #6, but Marta Kostyuk had been the form player, winning 4 of their last 5 on hard. 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 |
| 2026-04-21 | Madrid | F | clay | Marta Kostyuk | 6-3 7-5 |
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.: 1 day rest · 2 matches, 55 games (7d) · Andreeva M.: 1 day rest · 2 matches, 33 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