Caroline Wozniacki defeated Nadia Petrova 6-3 6-4 in the Charleston quarter-final on clay. The result followed the form book — Caroline Wozniacki came in leading the head-to-head 4–2, defending last year's final. Caroline Wozniacki extended the head-to-head to 5–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2013-03-04 | Indian Wells | R16 | hard | Caroline Wozniacki | 7-6(3) 6-3 |
| 2012-10-29 | Tournament of Champions | F | hard | Nadia Petrova | 6-2 6-1 |
| 2011-02-21 | Doha | R16 | hard | Caroline Wozniacki | 6-3 6-2 |
| 2010-08-23 | New Haven | F | hard | Caroline Wozniacki | 6-3 3-6 6-3 |
| 2010-03-08 | Indian Wells | R16 | hard | Caroline Wozniacki | 6-3 3-6 6-0 |
| 2008-10-06 | Moscow | R16 | hard | Nadia Petrova | 6-4 3-2 RET |
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 (199 vs 167). ATP, WTA & Challenger.
Performance in the biggest moments — break points, deciding sets and tiebreaks (0–100, higher is better). About