Pedro Nieto defeated Guillermo Platel 6-2 6-4 in the Portugal 1 Masters 1 round of 16 on clay. The upset overturned the form book — Guillermo Platel came in leading the head-to-head 1–0. Pedro Nieto claimed a first win over Guillermo Platel in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1998-07-27 | Spain F4 | R32 | clay | Guillermo Platel | 7-6 6-1 |