Natalia Guitler defeated Fernanda Hermenegildo 6-4 6-3 in the Barueri 10K qualifying round on hard. The upset overturned the form book — Fernanda Hermenegildo came in leading the head-to-head 1–0. Natalia Guitler claimed a first win over Fernanda Hermenegildo in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2008-09-08 | Santos 10K | F | clay | Fernanda Hermenegildo | 6-3 6-4 |