Maria Eugenia Torres defeated Gabriella Barbosa Costa Silva 5-7 7-5 6-1 in the Buenos Aires 10K round of 16 on clay. The upset overturned the form book — Gabriella Barbosa Costa Silva came in leading the head-to-head 1–0. Maria Eugenia Torres claimed a first win over Gabriella Barbosa Costa Silva in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2009-11-30 | La Serena 10K | R32 | clay | Gabriella Barbosa Costa Silva | 7-5 6-1 |