Sara Gimenez defeated Tatiana Bua 2-6 7-5 6-4 in the Encarnacion 10K round of 16 on clay. The upset overturned the form book — Tatiana Bua came in leading the head-to-head 1–0, but Sara Gimenez had been the form player, winning 1 of their last 4 on clay. Sara Gimenez claimed a first win over Tatiana Bua in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2011-11-07 | Asuncion 10K | R32 | clay | Tatiana Bua | 6-0 6-2 |