Juan Antonio Saiz Panadero defeated Juan Carlos Ferrero 1-6 6-4 6-3 in the Spain F6 qualifying round on clay. The upset overturned the form book — Juan Carlos Ferrero came in leading the head-to-head 2–0. Juan Antonio Saiz Panadero claimed a first win over Juan Carlos Ferrero in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1999-01-29 | Spain 2 Masters 1 | R16 | clay | Juan Carlos Ferrero | 6-4 6-3 |
| 1998-08-31 | Spain F8 | SF | clay | Juan Carlos Ferrero | 6-4 6-2 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.