Norbert Mazany defeated Patricio Rudi 6-1 7-5 in the Peru F3 round of 32 on clay. The upset overturned the form book — Patricio Rudi came in leading the head-to-head 1–0, but Norbert Mazany had been the form player, winning 3 of their last 6 on clay. Norbert Mazany claimed a first win over Patricio Rudi in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1998-12-07 | Uruguay F3 | R32 | clay | Patricio Rudi | 5-7 6-1 6-1 |