Carlos Castellanos defeated Ruben Ramirez Hidalgo 6-4 6-2 in the Spain F4 round of 16 on clay. The result followed the form book — Carlos Castellanos came in leading the head-to-head 2–1. Carlos Castellanos extended the head-to-head to 3–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1998-06-05 | Spain 6 Masters 3 | QF | clay | Ruben Ramirez Hidalgo | 6-3 6-0 |
| 1998-06-05 | Spain 6 Masters 4 | R16 | clay | Carlos Castellanos | 6-7 6-1 6-4 |
| 1998-05-08 | Spain 5 Masters 3 | R16 | clay | Carlos Castellanos | 3-6 7-6 6-0 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.