Singles
2015 Open de Rennes
Final
Champion	Malek Jaziri
Runner-up	Igor Sijsling
Score	5–7, 7–5, 6–4
Events
Singles Doubles
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Steve Darcis was the defending champion, but lost in the second round. Malek Jaziri won the title defeating Igor Sijsling in the final 5–7, 7–5, 6–4

	Semifinals							Final
	8	Illya Marchenko	66	6	4
		Igor Sijsling	78	3	6
									Igor Sijsling	7	5	4
								4	Malek Jaziri	5	7	6
	4	Malek Jaziri	65	6	77
	7	Ivan Dodig	77	3	63

	First round							Second round							Quarterfinals							Semifinals
	1	R Haase	2	2
	WC	M Teixeira	6	6				WC	M Teixeira	3	4
		K Khachanov	4	77	77				K Khachanov	6	6
		C Hemery	6	65	64											K Khachanov	4	3
		N Gomboš	6	6											8	I Marchenko	6	6
		A Arnaboldi	4	2					N Gomboš	1	6	5
		M Authom	1	3				8	I Marchenko	6	2	7
	8	I Marchenko	6	6																		8	I Marchenko	66	6	4
	3	S Darcis	7	6																			I Sijsling	78	3	6
	Q	Jeremy Jahn	5	4				3	S Darcis	4	2
		I Sijsling	6	77					I Sijsling	6	6
	Q	R Jouan	2	64												I Sijsling	68	6	77
		J Mertl	6	6												J Mertl	710	3	63
	Q	Romain Barbosa	4	3					J Mertl	6	6
	WC	M Janvier	4	5				5	F Krajinović	3	4
	5	F Krajinović	6	7

	First round							Second round							Quarterfinals							Semifinals
	6	M İlhan	2	7	6
	WC	E Couacaud	6	5	2			6	M İlhan	6	6
	Alt	J Eysseric	6	6				Alt	J Eysseric	2	4
		J-P Smith	2	4											6	M İlhan	2	6	2
		D Guez	4	4											4	M Jaziri	6	1	6
		E Ymer	6	6					E Ymer	1r
	Q	James Marsalek	1	2				4	M Jaziri	4
	4	M Jaziri	6	6																		4	M Jaziri	65	6	77
	7	I Dodig	6	6																		7	I Dodig	77	3	63
	Alt	A Smirnov	2	3				7	I Dodig	7	77
	LL	Sebastien Boltz	5	2					M Copil	5	63
		M Copil	7	6											7	I Dodig	6	4	6
	WC	A Sidorenko	77	77												V Millot	4	6	3
		L Vanni	64	62				WC	A Sidorenko	4	78	1
		V Millot	78	6					V Millot	6	66	6
	2	S Giraldo	66	2

• Main Draw
• Qualifying Draw