| Singles | |
|---|---|
| 2005 Mercedes-Benz Cup | |
| Champion |
|
| Runner-up |
|
| Final score | 6–4, 7–5 |
| Draw | 32 (4Q / 3WC) |
| Seeds | 8 |
Tommy Haas was the defending champion, but lost in the second round this year.
Andre Agassi won the tournament, beating Gilles Müller in the final, 6–4, 7–5.