Simona Halep defeated Flavia Pennetta 6-0 6-3 in the WTA Finals round robin on hard. The upset overturned the form book — Flavia Pennetta came in leading the head-to-head 4–1. Simona Halep narrowed the head-to-head to 4–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2015-08-31 | US Open | SF | hard | Flavia Pennetta | 6-1 6-3 |
| 2015-03-23 | Miami | R16 | hard | Simona Halep | 6-3 7-5 |
| 2013-08-26 | US Open | R16 | hard | Flavia Pennetta | 6-2 7-6(3) |
| 2013-07-15 | Bastad | R16 | clay | Flavia Pennetta | 4-6 7-5 2-0 RET |
| 2010-04-05 | Marbella | QF | clay | Flavia Pennetta | 6-4 7-6(4) |
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 (198 vs 32). ATP, WTA & Challenger.
Performance in the biggest moments — break points, deciding sets and tiebreaks (0–100, higher is better). About