Oscar Martinez Dieguez defeated Ivan Navarro 6-3 6-2 in the Spain 5 Masters 4 qualifying round on clay. The upset overturned the form book — Ivan Navarro came in leading the head-to-head 2–1. Oscar Martinez Dieguez narrowed the head-to-head to 2–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2000-04-07 | Spain 4 4 | QF | clay | Ivan Navarro | 7-5 7-5 |
| 2000-02-04 | Spain 2 Masters 2 | R32 | clay | Ivan Navarro | 6-2 3-6 6-4 |
| 1999-07-12 | Spain F2 | R32 | clay | Oscar Martinez Dieguez | 6-4 6-3 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.