Guillermo Platel defeated Pedro Nieto 7-6 6-1 in the Spain F4 round of 32 on clay. The upset overturned the form book — Pedro Nieto came in leading the head-to-head 1–0. Guillermo Platel claimed a first win over Pedro Nieto in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1999-05-01 | Portugal 1 Masters 1 | R16 | clay | Pedro Nieto | 6-2 6-4 |