Karolina Nowak defeated Barbara Rush 6-2 7-5 in the Concepcion 10K round of 32 on clay. The upset overturned the form book — Barbara Rush came in leading the head-to-head 1–0. Karolina Nowak claimed a first win over Barbara Rush in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2010-11-08 | Tandil 10K | QF | clay | Barbara Rush | 2-6 6-1 6-2 |