Albert Montanes defeated Carlos Castellanos 6-0 6-3 in the Spain 7 Masters 1 qualifying round on clay. The upset overturned the form book — Carlos Castellanos came in leading the head-to-head 1–0. Albert Montanes claimed a first win over Carlos Castellanos in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1998-08-17 | Spain F6 | R16 | clay | Carlos Castellanos | 6-4 6-2 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.