| Singles | |
|---|---|
| 2004 BA-CA-TennisTrophy | |
| Champion |
|
| Runner-up |
|
| Final score | 6–4, 1–6, 7–5, 3–6, 7–5 |
Roger Federer was the defending champion, but did not participate this year.
Feliciano López won the title, defeating Guillermo Cañas 6–4, 1–6, 7–5, 3–6, 7–5 in the final.