Anastasia Potapova defeated Marta Kostyuk 6-1 6-3 in the Miami round of 64 on hard. The upset overturned the form book — Marta Kostyuk came in leading the head-to-head 2–0, defending last year's round of 64. Anastasia Potapova claimed a first win over Marta Kostyuk in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2026-04-30 | Madrid | SF | clay | Marta Kostyuk | 6-2 1-6 6-1 |
| 2024-03-14 | Indian Wells | QF | hard | Marta Kostyuk | 6-0 7-5 |
Averages over each player's completed matches in the selected window (91 vs 177). ATP, WTA & Challenger.
Performance in the biggest moments — break points, deciding sets and tiebreaks (0–100, higher is better). About
Potapova A.: 4 days rest · 1 match, 18 games (7d) · Kostyuk M.: 1 day rest · 3 matches, 79 games (7d). Higher means fresher. About
wins 55% of points on serve vs Kostyuk M.
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