Nataly Yoo defeated Luciana Sarmenti 6-1 7-5 in the Guayaquil 10K round of 16 on hard. Nataly Yoo extended the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2010-11-22 | Asuncion 10K | R32 | clay | Luciana Sarmenti | 6-4 2-6 6-4 |
| 2007-05-07 | Cordoba 10K | R32 | clay | Nataly Yoo | 6-2 6-4 |