Oscar Ortiz defeated Patricio Quijano 3-6 6-0 6-0 in the Colombia Masters 1 semi-final on clay. The upset overturned the form book — Patricio Quijano came in leading the head-to-head 2–1. Oscar Ortiz narrowed the head-to-head to 2–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1992-05-04 | Caribbean 1 Masters 2 | QF | clay | Patricio Quijano | 6-2 7-5 |
| 1991-06-29 | Mexico 2 Masters 1 | R32 | hard | Patricio Quijano | 7-6 6-4 |
| 1991-06-29 | Mexico 2 Masters 4 | R16 | hard | Oscar Ortiz | 6-1 7-6 |