Fernanda Hermenegildo defeated Tatiana Bua 6-7 6-4 6-1 in the Buenos Aires 10K qualifying round on clay. Fernanda Hermenegildo extended the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2009-11-09 | Itajai 10K | R32 | clay | Tatiana Bua | 6-3 1-6 6-2 |
| 2008-07-21 | Brasilia 10K | QF | clay | Fernanda Hermenegildo | 7-5 6-2 |