| Men's Singles | |
|---|---|
| 1998 Estoril Open | |
| Champion |
|
| Runner-up |
|
| Final score | 3–6, 6–1, 6–3 |
Àlex Corretja was the defending champion, but did not participate this year.
Alberto Berasategui won the tournament, beating Thomas Muster in the final, 3–6, 6–1, 6–3.