| Singles | |
|---|---|
| 2008 Mercedes Cup | |
| Champion |
|
| Runner-up |
|
| Final score | 6–4, 7–5 |
| Draw | 28 (4Q / 3WC) |
| Seeds | 8 |
Rafael Nadal was the defending champion, but was forced to withdraw due to a knee injury.
Unseeded Juan Martín del Potro won in the final 6–4, 7–5, against second-seeded Richard Gasquet.
The top four seeds receive a bye into the second round.