Victoria Azarenka defeated Klara Koukalova 6-2 6-1 in the US Open round of 128 on hard. The result followed the form book — Victoria Azarenka came in leading the head-to-head 2–0, defending last year's round of 16. Victoria Azarenka extended the head-to-head to 3–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2011-09-26 | Tokyo | R16 | hard | Victoria Azarenka | 6-3 7-5 |
| 2008-04-28 | Prague | SF | clay | Victoria Azarenka | 6-3 6-2 |
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 (195 vs 76). ATP, WTA & Challenger.
Performance in the biggest moments — break points, deciding sets and tiebreaks (0–100, higher is better). About