Carolina Zeballos defeated Tatiana Bua 6-0 6-4 in the Cordoba 10K round of 16 on clay. The upset overturned the form book — Tatiana Bua came in leading the head-to-head 1–0. Carolina Zeballos claimed a first win over Tatiana Bua in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2009-04-13 | Buenos Aires 10K | R32 | clay | Tatiana Bua | 6-1 6-1 |