| Singles | |
|---|---|
| 2004 Heineken Open | |
| 2003 Champion |
|
| Champion |
|
| Runner-up |
|
| Final score | 4–6, 6–2, 7–5 |
Gustavo Kuerten was the defending champion but lost in the semifinals to Dominik Hrbatý.
Hrbatý won in the final 4–6, 6–2, 7–5 against Rafael Nadal.
A champion seed is indicated in bold text while text in italics indicates the round in which that seed was eliminated.