Tatiana Bua defeated Estefania Donnet 2-6 7-5 7-6 in the Buenos Aires 10K round of 16 on clay. Tatiana Bua extended the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2010-11-22 | Asuncion 10K | R16 | clay | Estefania Donnet | 6-1 6-4 |
| 2009-04-20 | Buenos Aires 10K | QF | clay | Tatiana Bua | 7-6(3) 6-2 |