Ricardo Schlachter defeated Paulo Carvallo 6-4 6-4 in the Paraguay F1 round of 16 on clay. The upset overturned the form book — Paulo Carvallo came in leading the head-to-head 1–0. Ricardo Schlachter claimed a first win over Paulo Carvallo in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1997-10-25 | Brazil 4 Masters 4 | R32 | clay | Paulo Carvallo | 7-6 5-7 7-6 |