| Singles | |
|---|---|
| 2004 WTA German Open | |
| Champion |
|
| Runner-up |
|
| Final score | Walkover |
Justine Henin-Hardenne was the defending champion, but did not compete this year due to a cytomegalovirus.
Amélie Mauresmo won the title by walkover, as her opponent Venus Williams had to withdrew due to a left ankle strain. It was the 1st title of the year for Mauresmo and the 11th title of her career.
The first eight seeds received a bye into the second round.