Maria Jose Argeri defeated Ana Lucia Migliarini De Leon 6-2 6-4 in the Juarez 25K round of 32 on clay. The upset overturned the form book — Ana Lucia Migliarini De Leon came in leading the head-to-head 1–0. Maria Jose Argeri claimed a first win over Ana Lucia Migliarini De Leon in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2003-03-03 | Mexico Circuit 3 40K | R32 | hard | Ana Lucia Migliarini De Leon | 7-5 7-6 |