The 2011 Open de Rennes was a professional tennis tournament played on hard courts.

It was the sixth edition of the tournament which was part of the 2011 ATP Challenger Tour.

The following players received wildcards into the singles main draw: The following players received entry from the qualifying draw: Julien Benneteau def.

Olivier Rochus, 6–4, 6–3 Martin Emmrich / Andreas Siljeström def.

Kenny de Schepper / Édouard Roger-Vasselin, 6–4, 6–4