Gregory Zavialoff defeated Eduardo Nicolas 6-0 6-1 in the Spain 5 4 round of 16 on clay. The upset overturned the form book — Eduardo Nicolas came in leading the head-to-head 2–0. Gregory Zavialoff claimed a first win over Eduardo Nicolas in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1999-01-02 | Spain 1 Masters 3 | R32 | clay | Eduardo Nicolas | 6-1 6-2 |
| 1998-10-16 | Spain 8 Masters 2 | QF | clay | Eduardo Nicolas | 6-4 6-1 |