Nadia Petrova defeated Polona Hercog 6-2 6-4 in the US Open round of 64 on hard. The upset overturned the form book — Polona Hercog came in leading the head-to-head 2–0, defending last year's round of 128. Nadia Petrova claimed a first win over Polona Hercog in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2012-04-02 | Charleston | QF | clay | Polona Hercog | 6-1 6-2 |
| 2011-08-22 | New Haven | R32 | hard | Polona Hercog | 7-5 7-5 |
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 (120 vs 200). ATP, WTA & Challenger.
Performance in the biggest moments — break points, deciding sets and tiebreaks (0–100, higher is better). About