Micaela Moran defeated Valentina Castro 6-4 1-6 7-6 in the Los Mochis 10K round of 16 on clay. The upset overturned the form book — Valentina Castro came in leading the head-to-head 1–0. Micaela Moran claimed a first win over Valentina Castro in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2004-08-16 | Guayaquil 10K | R32 | hard | Valentina Castro | 7-5 6-4 |