Ashleigh Barty defeated Simona Halep 6-4 6-4 in the Sydney round of 16 on hard. The upset overturned the form book — Simona Halep came in leading the head-to-head 3–0, but Ashleigh Barty had been the form player, winning 9 of their last 9 on hard. Ashleigh Barty claimed a first win over Simona Halep in four meetings, narrowing the head-to-head to 3–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2019-05-06 | Madrid | QF | clay | Simona Halep | 7-5 7-5 |
| 2018-08-13 | Cincinnati | R16 | hard | Simona Halep | 7-5 6-4 |
| 2018-08-06 | Montreal | SF | hard | Simona Halep | 6-4 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 (142 vs 172). ATP, WTA & Challenger.