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| 2015 Open de Rennes | |
|---|---|
| Date | 12–18 October |
| Edition | 9th |
| Surface | Hard |
| Location | Rennes, France |
| Champions | |
| Singles | |
 Malek Jaziri | |
| Doubles | |
 Andrea Arnaboldi /  Antonio Šančić | |
The 2015 Open de Rennes was a professional tennis tournament played on hard courts. It was the tenth edition of the tournament which was part of the 2015 ATP Challenger Tour. It took place in Rennes, France between 12 and 18 October 2015.
| Country | Player | Rank1 | Seed |
|---|---|---|---|
 NED | Robin Haase | 60 | 1 |
 COL | Santiago Giraldo | 65 | 2 |
 BEL | Steve Darcis | 66 | 3 |
| TUN | Malek Jaziri | 84 | 4 |
 SRB | Filip Krajinović | 87 | 5 |
 TUR | Marsel İlhan | 91 | 6 |
| CRO | Ivan Dodig | 109 | 7 |
 UKR | Illya Marchenko | 111 | 8 |
The following players received wildcards into
The following players entered the singles main draw as alternates:
The following players received entry from the qualifying draw:
Romain Barbosa
Jeremy Jahn
Romain Jouan 
James MarsalekThe following player entered as a lucky loser:
Sebastien Boltz Malek Jaziri def. Igor Sijsling, 5–7, 7–5, 6–4. [1] Andrea Arnaboldi / Antonio Šančić def. Wesley Koolhof / Matwé Middelkoop, 6–4, 2–6, [14–12]The 2010 Open de Rennes was a professional tennis tournament played on hard courts. It was the fifth edition of the tournament which was part of the 2010 ATP Challenger Tour. It took place in Rennes, France between 12 and 17 October 2010.
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