Juan Antonio Saiz Panadero defeated Gregory Zavialoff 4-6 6-3 6-0 in the Spain F6 round of 32 on clay. The upset overturned the form book — Gregory Zavialoff came in leading the head-to-head 2–0. Juan Antonio Saiz Panadero claimed a first win over Gregory Zavialoff in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1999-05-07 | Spain 5 Masters 3 | R16 | clay | Gregory Zavialoff | 6-3 1-0 |
| 1998-05-08 | Spain 5 Masters 3 | QF | clay | Gregory Zavialoff | 7-5 7-6 |