Coco Vandeweghe defeated Simona Halep 6-4 6-1 in the Stuttgart quarter-final on clay. The upset overturned the form book — Simona Halep came in leading the head-to-head 1–0, defending last year's semi-final. Coco Vandeweghe claimed a first win over Simona Halep in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2017-05-08 | Madrid | QF | clay | Simona Halep | 6-1 6-1 |
Each player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. About
Averages over each player's completed matches in the selected window (118 vs 198). ATP, WTA & Challenger.
Performance in the biggest moments — break points, deciding sets and tiebreaks (0–100, higher is better). About