The 2012 Open de Rennes was a professional tennis tournament played on hard courts. It was the seventh edition of the tournament which was part of the 2012 ATP Challenger Tour. It took place in Rennes, France between 8 and 14 October 2012.
Singles main-draw entrants
Seeds
1 Rankings are as of October 1, 2012.
Other entrants
The following players received wildcards into the singles main draw: Grégoire Burquier Marc Gicquel Julien Obry Maxime Teixeira
The following players received entry from the qualifying draw: Laurynas Grigelis Illya Marchenko Fabrice Martin Dominic Thiem
The following players received entry into the singles main draw as a lucky loser: Martin Fischer
Champions
Singles
Kenny de Schepper def. Illya Marchenko, 6–3, 6–2
Doubles
Philipp Marx / Florin Mergea def. Tomasz Bednarek / Mateusz Kowalczyk, 6–3, 6–2