2005 Stuttgart Open – Singles
| Singles | |
|---|---|
| 2005 Mercedes Cup | |
| Champion | Rafael Nadal |
| Runner-up | Gastón Gaudio |
| Score | 6–3, 6–3, 6–4 |
| Draw | 48 |
| Seeds | 16 |
Rafael Nadal defeated Gastón Gaudio in the final, 6–3, 6–3, 6–4 to win the singles tennis title at the 2005 Stuttgart Open.
Guillermo Cañas was the reigning champion, but did not participate this year.