Giovanna Tomita defeated Maria Agustina De Carli 6-4 6-7 6-4 in the Buenos Aires $10K round of 16 on clay. The upset overturned the form book — Maria Agustina De Carli came in leading the head-to-head 1–0, but Giovanna Tomita had been the form player, winning 3 of their last 7 on clay. Giovanna Tomita claimed a first win over Maria Agustina De Carli in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2013-06-03 | Santos 10K | Q32 | clay | Maria Agustina De Carli | 2-6 7-5 6-2 |