2004 Gerry Weber Open – Singles
| Singles | |
|---|---|
| 2004 Gerry Weber Open | |
| Champion | Roger Federer |
| Runner-up | Mardy Fish |
| Score | 6–0, 6–3 |
| Draw | 32 |
| Seeds | 8 |
Roger Federer was the defending champion, and won in the final 6–0, 6–3 against Mardy Fish. It was his second singles title in Halle. He did not lose a single set in the entire tournament.