Stephanie Schaer defeated Lorena Villalobos Cruz 6-2 6-4 in the Aguascalientes 10K round of 32 on clay. The upset overturned the form book — Lorena Villalobos Cruz came in leading the head-to-head 1–0. Stephanie Schaer claimed a first win over Lorena Villalobos Cruz in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2004-10-18 | Aguascalientes 10K | R32 | clay | Lorena Villalobos Cruz | 6-2 4-0 |