Nadia Petrova defeated Na Li 6-2 6-3 in the Stuttgart quarter-final on clay. The result followed the form book — Nadia Petrova came in leading the head-to-head 5–1, defending last year's quarter-final. Nadia Petrova extended the head-to-head to 6–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2012-10-01 | Beijing | R32 | hard | Na Li | 6-1 6-2 |
| 2008-06-16 | Eastbourne | R16 | grass | Nadia Petrova | 6-2 6-7(5) 6-3 |
| 2006-05-08 | Berlin | SF | grass | Nadia Petrova | 6-1 6-0 |
| 2006-02-27 | Doha | QF | hard | Nadia Petrova | 6-4 6-4 |
| 2005-08-15 | Toronto | R16 | hard | Nadia Petrova | 6-2 3-0 RET |
| 2005-01-03 | Gold Coast | R16 | hard | Nadia Petrova | 7-5 6-3 |
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 200). ATP, WTA & Challenger.
Performance in the biggest moments — break points, deciding sets and tiebreaks (0–100, higher is better). About