Julia Vakulenko defeated Polona Hercog 5-7 6-4 6-4 in the Portoroz round of 32 on hard. The upset overturned the form book — Polona Hercog came in leading the head-to-head 1–0, defending last year's round of 32. Julia Vakulenko claimed a first win over Polona Hercog in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2009-05-20 | Roland Garros | Q128 | clay | Polona Hercog | 6-4 7-6(2) |
Averages over each player's completed matches in the selected window (13 vs 200). ATP, WTA & Challenger.
Performance in the biggest moments — break points, deciding sets and tiebreaks (0–100, higher is better). About
Each player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. About