Doubles
2018 Open de Rennes
Final
Champions	Sander Gillé Joran Vliegen
Runners-up	Sander Arends Antonio Šančić
Score	6–3, 6–7(1–7), [10–7]
Events
Singles Doubles
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Evgeny Donskoy and Mikhail Elgin were the defending champions but chose not to defend their title.

Sander Gillé and Joran Vliegen won the title after defeating Sander Arends and Antonio Šančić 6–3, 6–7^(1–7), [10–7] in the final.

	First round							Quarterfinals							Semifinals							Final
	1	J Eysseric H Nys	77	6
		R Berankis G Elias	64	0				1	J Eysseric H Nys	6	6
		T Matsui A Motti	1	77	[6]				K de Schepper G Sakharov	4	0
		K de Schepper G Sakharov	6	65	[10]										1	J Eysseric H Nys	4	78	[7]
	4	S Gillé J Vliegen	6	6											4	S Gillé J Vliegen	6	66	[10]
	WC	C Hemery L Lokoli	4	3				4	S Gillé J Vliegen	6	6
		S Clayton J O'Mara	4	78	[8]				D Brown D Pel	3	2
		D Brown D Pel	6	66	[10]																	4	S Gillé J Vliegen	6	61	[10]
	WC	M Guinard M Janvier	2	6	[6]																	2	S Arends A Šančić	3	77	[7]
		S Balaji V Vardhan	6	4	[10]				S Balaji V Vardhan	3	77	[10]
		U Ignatik Y Uchiyama	3	4				3	R Arneodo T-S Weissborn	6	64	[7]
	3	R Arneodo T-S Weissborn	6	6												S Balaji V Vardhan	4	4
		S Stakhovsky M Youzhny	6	6											2	S Arends A Šančić	6	6
		M Draganja T Draganja	4	4					S Stakhovsky M Youzhny
	WC	E Furness T Lamasine	2	4				2	S Arends A Šančić	w/o
	2	S Arends A Šančić	6	6

• Main Draw