

Qinwen Zheng defeated Marta Kostyuk 6-3 6-2 in the Indian Wells round of 16 on hard. The upset overturned the form book — Marta Kostyuk came in ranked #13, defending last year's semi-final. Qinwen Zheng extended the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2024-04-15 | Stuttgart | R16 | clay | Marta Kostyuk | 6-2 4-6 7-5 |
| 2023-08-07 | Montreal | R64 | hard | Qinwen Zheng | 6-2 1-6 6-3 |
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
Averages over each player's completed matches in the selected window (40 vs 62). ATP, WTA & Challenger.
Performance in the biggest moments — break points, deciding sets and tiebreaks (0–100, higher is better). About
The Umpiry Score combines match-context factors — matchup, form, fatigue, travel and motivation — into a single 0–10 score, updated daily. Read how it works.
Zheng Q.: 13 days rest · 1 match (14d) · Kostyuk M.: 3 days rest · 3 matches, 57 games (7d). Higher means fresher. About