Mariano Campos defeated Raul Valdes 6-1 7-6 in the Chile 1 Masters 4 round of 32 on clay. The result followed the form book — Mariano Campos came in leading the head-to-head 2–0. Mariano Campos extended the head-to-head to 3–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1998-08-03 | Ecuador F1 | R32 | clay | Mariano Campos | 6-1 6-4 |
| 1998-05-02 | Chile 2 Masters 1 | R16 | clay | Mariano Campos | 7-5 6-4 |