Ana Clara Duarte defeated Sandra Zaniewska 4-6 6-3 6-3 in the Darwin 25K round of 32 on hard. The upset overturned the form book — Sandra Zaniewska came in leading the head-to-head 1–0. Ana Clara Duarte claimed a first win over Sandra Zaniewska in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2011-07-04 | Aschaffenburg 25K | R32 | clay | Sandra Zaniewska | 7-6(5) 1-6 6-1 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.