Doubles
2021 European Open
Final
Champions	Nicolas Mahut Fabrice Martin
Runners-up	Wesley Koolhof Jean-Julien Rojer
Score	6–0, 6–1
Events
Singles Doubles
← 2020 · European Open · 2022 →

John Peers and Michael Venus were the defending champions, but chose not to participate this year.^[1]

Nicolas Mahut and Fabrice Martin won the title, defeating Wesley Koolhof and Jean-Julien Rojer in the final, 6–0, 6–1.

	First round							Quarterfinals							Semifinals							Final
	1	I Dodig M Melo	6	77
		D Pel B van de Zandschulp	3	64				1	I Dodig M Melo	4	6	[7]
	WC	L Harris X Malisse	6	77				WC	L Harris X Malisse	6	3	[10]
		R Arneodo M Reid	4	64											WC	L Harris X Malisse	4	2
	3	W Koolhof J-J Rojer	6	6											3	W Koolhof J-J Rojer	6	6
		R Jebavý A Vasilevski	4	2				3	W Koolhof J-J Rojer	w/o
		L Musetti B Paire	62	79	[10]				L Musetti B Paire
		N Monroe R Opelka	77	67	[8]																	3	W Koolhof J-J Rojer	0	1
		F Nielsen M Sabanov	4	4																		2	N Mahut F Martin	6	6
		D Molchanov A Nedovyesov	6	6					D Molchanov A Nedovyesov	6	0
		F Delbonis D Vega Hernández	5	6	[11]				F Delbonis D Vega Hernández	3	0r
	4	S Gillé J Vliegen	7	4	[9]											D Molchanov A Nedovyesov	65	2
		O Marach P Oswald	4	6	[10]										2	N Mahut F Martin	77	6
		J Erlich A Göransson	6	4	[6]				O Marach P Oswald	63	4
	WC	R Bemelmans K Coppejans	3	2				2	N Mahut F Martin	77	6
	2	N Mahut F Martin	6	6

• Main Draw