| 2013 Open de Rennes | |
|---|---|
| Date | 7 – 13 October |
| Edition | 8th |
| Surface | Hard |
| Location | Rennes, France |
| Champions | |
| Singles | |
 Nicolas Mahut | |
| Doubles | |
 Florin Mergea /  Oliver Marach | |
The 2013 Open de Rennes was a professional tennis tournament played on hard courts. It was the eight edition of the tournament which was part of the 2013 ATP Challenger Tour. It took place in Rennes, France between 7 and 13 October 2013.
| Country | Player | Rank1 | Seed |
|---|---|---|---|
| FRA | Kenny de Schepper | 67 | 1 |
| FRA | Nicolas Mahut | 68 | 2 |
| FRA | Guillaume Rufin | 84 | 3 |
 NED | Jesse Huta Galung | 96 | 4 |
 CZE | Jan Hájek | 101 | 5 |
| FRA | Marc Gicquel | 110 | 6 |
 SVK | Andrej Martin | 126 | 7 |
| ROU | Marius Copil | 130 | 8 |
The following players received wildcards into the singles main draw:
The following players used protected ranking to get into the singles main draw:
The following players received entry from the qualifying draw:
Kimmer Coppejans Constant Lestienne
Björn Phau 
Jürgen Zopp Nicolas Mahut def. Kenny de Schepper 6–3, 7–6(7–3) Florin Mergea / Oliver Marach def. 
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