Carlos Castellanos defeated Albert Montanes 6-4 6-2 in the Spain F6 round of 16 on clay. The upset overturned the form book — Albert Montanes came in leading the head-to-head 1–0. Carlos Castellanos claimed a first win over Albert Montanes in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1999-10-15 | Spain 7 Masters 1 | QF | clay | Albert Montanes | 6-0 6-3 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.