Nadia Petrova defeated Tsvetana Pironkova 5-7 6-1 6-3 in the Tournament of Champions round robin on hard. The upset overturned the form book — Tsvetana Pironkova came in leading the head-to-head 1–0. Nadia Petrova claimed a first win over Tsvetana Pironkova in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2012-05-21 | Brussels | R16 | clay | Tsvetana Pironkova | 6-3 6-2 |
Averages from each player's recent completed matches (20 vs 20). ATP, WTA & Challenger.