Carlos Castellanos defeated Daniel Navas 7-5 6-2 in the Spain F3 round of 32 on clay. The upset overturned the form book — Daniel Navas came in leading the head-to-head 1–0. Carlos Castellanos claimed a first win over Daniel Navas in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1998-06-05 | Spain 6 Masters 4 | QF | clay | Daniel Navas | 6-1 6-4 |