Oscar Ortiz defeated Samuel Constantino 6-3 6-1 in the Central America Masters 1 round of 32 on carpet. The result followed the form book — Oscar Ortiz came in leading the head-to-head 1–0. Oscar Ortiz extended the head-to-head to 2–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1991-06-29 | Mexico 2 Masters 2 | R16 | hard | Oscar Ortiz | 7-6 6-1 |