Nadia Petrova defeated Roberta Vinci 6-7 6-1 6-4 in the Tournament of Champions semi-final on hard. The upset overturned the form book — Roberta Vinci came in leading the head-to-head 3–2, defending last year's quarter-final. Nadia Petrova narrowed the head-to-head to 3–3.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2013-01-07 | Sydney | R32 | hard | Roberta Vinci | 7-5 7-5 |
| 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 |
Averages from each player's recent completed matches (20 vs 20). ATP, WTA & Challenger.