Roberta Vinci defeated Nadia Petrova 7-5 7-5 in the Sydney round of 32 on hard. The upset overturned the form book — Nadia Petrova came in leading the head-to-head 3–2, but Roberta Vinci had been the form player, winning 3 of their last 5 on hard. Roberta Vinci narrowed the head-to-head to 3–3.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2012-10-29 | Tournament of Champions | SF | hard | Nadia Petrova | 6-7(8) 6-1 6-4 |
| 2012-04-30 | Estoril | QF | clay | Roberta Vinci | 6-2 1-6 6-4 |
| 2011-08-15 | Cincinnati | R64 | hard | Nadia Petrova | 6-3 0-6 6-4 |
| 2011-02-21 | Doha | R32 | hard | Nadia Petrova | 6-4 6-2 |
| 2010-09-27 | Tokyo | R64 | hard | Roberta Vinci | 7-5 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 (200 vs 31). ATP, WTA & Challenger.
Performance in the biggest moments — break points, deciding sets and tiebreaks (0–100, higher is better). About