The 2011 Moselle Open was a men's tennis tournament played on indoor hard courts. It was the ninth edition of the Moselle Open, and was part of the ATP World Tour 250 Series of the 2011 ATP World Tour. It was held at the Parc des Expositions de Metz Métropole in Metz, France, from 17 September until 23 September 2011. Jo-Wilfried Tsonga won the singles title.
| Country | Player | Rank1 | Seed | |
|---|---|---|---|---|
 France | Jo-Wilfried Tsonga | 10 | 1 | |
| France | Richard Gasquet | 15 | 2 | |
 Ukraine | Alexandr Dolgopolov | 20 | 3 | |
| Ivan Ljubičić | 29 | 4 | ||
| France | Michaël Llodra | 33 | 6 | |
 Belgium | Xavier Malisse | 46 | 6 | |
| Philipp Kohlschreiber | 48 | 7 | ||
 Luxembourg | Gilles Müller | 49 | 8 |
The following players received wildcards into the singles main draw:
The following players received entry from the qualifying draw:
See main article: 2011 Open de Moselle – Singles qualifying.
See main article: 2011 Open de Moselle – Singles. Jo-Wilfried Tsonga defeated Ivan Ljubičić, 6–3, 6–7(4–7), 6–3
See main article: 2011 Open de Moselle – Doubles. 
Jamie Murray / 
André Sá defeated 
Lukáš Dlouhý / Marcelo Melo, 6–4, 7–6(7)