Leticia Sobral defeated Estefania Balda Alvarez 6-2 4-6 6-3 in the Guayaquil 10K round of 32 on hard. The upset overturned the form book — Estefania Balda Alvarez came in leading the head-to-head 1–0. Leticia Sobral claimed a first win over Estefania Balda Alvarez in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2003-09-01 | Asuncion 10K | R16 | clay | Estefania Balda Alvarez | 6-3 6-3 |