Carlos Custodio defeated Oscar Rodriguez Arg 6-2 6-4 in the Brazil 4 Masters 4 round of 16 on clay. The upset overturned the form book — Oscar Rodriguez Arg came in leading the head-to-head 1–0. Carlos Custodio claimed a first win over Oscar Rodriguez Arg in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1997-10-25 | Brazil 4 Masters 2 | SF | clay | Oscar Rodriguez Arg | 6-1 6-2 |