Marcelo Rebelo defeated Juan Robinson Gamonal 7-5 6-0 in the Colombia Masters 3 round of 32 on clay. The upset overturned the form book — Juan Robinson Gamonal came in leading the head-to-head 1–0. Marcelo Rebelo claimed a first win over Juan Robinson Gamonal in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1993-08-15 | Ecuador Peru Masters 1 | R32 | clay | Juan Robinson Gamonal | 6-1 4-6 6-1 |