Oscar Ortiz defeated Dante Magnoni 6-4 3-6 6-3 in the Colombia Masters 4 qualifying round on clay. The upset overturned the form book — Dante Magnoni came in leading the head-to-head 1–0. Oscar Ortiz claimed a first win over Dante Magnoni in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1993-01-30 | Central America Masters 3 | R32 | hard | Dante Magnoni | 6-4 7-5 |