| Date: | 11–18 July |
| Edition: | 34th |
| Category: | World Tour 250 |
| Draw: | 32S / 16D |
| Prize Money: | €398,250 |
| Surface: | Clay / outdoor |
| Location: | Stuttgart, Germany |
| Venue: | Tennis Club Weissenhof |
| Champs: |  Juan Carlos Ferrero[1] |
| Champd: |  Jürgen Melzer / Philipp Petzschner[2] |
| Main Name: | Stuttgart Open |
The 2011 MercedesCup was a men's tennis tournament played on outdoor clay courts. It was the 34th edition of the Stuttgart Open, and was part of the ATP World Tour 250 series of the 2011 ATP World Tour. It was held at the Tennis Club Weissenhof in Stuttgart, Germany, from July 11 through July 18, 2011. Unseeded Juan Carlos Ferrero won the singles title.
| Nationality | Player | Ranking* | Seeding | |
|---|---|---|---|---|
 France | Gaël Monfils | 7 | 1 | |
| Austria | Jürgen Melzer | 12 | 2 | |
 Russian Federation | Mikhail Youzhny | 17 | 3 | |
| France | Gilles Simon | 18 | 4 | |
| Florian Mayer | 20 | 5 | ||
| Russian Federation | Nikolay Davydenko | 30 | 6 | |
 Italy | Andreas Seppi | 36 | 7 | |
| Spain | Guillermo García-López | 37 | 8 |
The following players received wildcards into the singles main draw:
The following players received entry from the qualifying draw:
The following players received entry to the main draw as lucky loser:
See main article: 2011 MercedesCup – Singles. Juan Carlos Ferrero defeated Pablo Andújar, 6–4, 6–0.
See main article: 2011 MercedesCup – Doubles. Jürgen Melzer / Philipp Petzschner defeated Marcel Granollers / Marc López, 6–3, 6–4.
