Natalia Guitler defeated Maria Claudia Santos Santanna 3-6 6-3 6-2 in the Serra Negra 10K round of 16 on clay. The result followed the form book — Natalia Guitler came in leading the head-to-head 2–0. Natalia Guitler extended the head-to-head to 3–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2009-09-28 | Juarez Chih 10K | R32 | clay | Natalia Guitler | 6-0 6-0 |
| 2008-09-01 | Barueri 10K | R16 | hard | Natalia Guitler | 6-4 6-3 |