Doubles
2018 Open Harmonie mutuelle
Final
Champions	Sander Arends Tristan-Samuel Weissborn
Runners-up	Luke Bambridge Joe Salisbury
Score	4–6, 6–1, [10–7]
Events
Singles Doubles
← 2017 · Open Harmonie mutuelle · 2019 →

Andre Begemann and Frederik Nielsen were the defending champions but chose not to defend their title.

Sander Arends and Tristan-Samuel Weissborn won the title after defeating Luke Bambridge and Joe Salisbury 4–6, 6–1, [10–7] in the final.

	First round							Quarterfinals							Semifinals							Final
	1	H Nys K Skupski	6	6
		B Mousley G Oliveira	4	4				1	H Nys K Skupski	7	7
		A Mies O Otte	77	6					A Mies O Otte	5	5
		N Lammons A Lawson	65	4											1	H Nys K Skupski	62	5
	4	L Bambridge J Salisbury	6	6											4	L Bambridge J Salisbury	77	7
		T Lamasine S Stakhovsky	4	4				4	L Bambridge J Salisbury	6	6
	WC	D Descloix C Lestienne	6	6				WC	D Descloix C Lestienne	4	1
	WC	G Barrère D Guez	3	4																		4	L Bambridge J Salisbury	6	1	[7]
		S Clayton D Pel	6	6																		3	S Arends T-S Weissborn	4	6	[10]
	WC	E Furness M Guinard	4	3					S Clayton D Pel	0	4
		Z Kolář L Margaroli	0	3				3	S Arends T-S Weissborn	6	6
	3	S Arends T-S Weissborn	6	6											3	S Arends T-S Weissborn	6	6
		R Berankis M Sabanov	3	3												Sa Ratiwatana So Ratiwatana	4	3
		M Safwat J Zopp	6	6					M Safwat J Zopp	1	1
		Sa Ratiwatana So Ratiwatana	77	3	[10]				Sa Ratiwatana So Ratiwatana	6	6
	2	J Nedunchezhiyan P Raja	65	6	[8]

• Main Draw