Armando Perez defeated Richard Schmidt 6-7 6-3 6-2 in the Mexico 4 Masters 2 final on hard. The upset overturned the form book — Richard Schmidt came in leading the head-to-head 1–0. Armando Perez claimed a first win over Richard Schmidt in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1991-09-30 | Mexcio 3 Masters 4 | R16 | hard | Richard Schmidt | 3-6 6-3 6-1 |