Doubles
2021 Moselle Open
Final
Champions	Hubert Hurkacz Jan Zieliński
Runners-up	Hugo Nys Arthur Rinderknech
Score	7–5, 6–3
Events
Singles Doubles
← 2019 · Moselle Open · 2022 →

Robert Lindstedt and Jan-Lennard Struff were the reigning champions from when the tournament was last held in 2019,^[1] but chose not to participate this year.

Hubert Hurkacz and Jan Zieliński won the title, defeating Hugo Nys and Arthur Rinderknech in the final, 7–5, 6–3.

	First round							Quarterfinals							Semifinals							Final
	1	H Kontinen B McLachlan	77	7
		M Reid K Skupski	63	5				1	H Kontinen B McLachlan	1	7	[10]
		A de Minaur D Vega Hernández	3	6	[5]			WC	G Barrère L Pouille	6	5	[7]
	WC	G Barrère L Pouille	6	3	[10]										1	H Kontinen B McLachlan	4	4
	3	O Marach P Oswald	6	6												H Hurkacz J Zieliński	6	6
		N Mahut V Pospisil	4	3				3	O Marach P Oswald	3	4
		H Hurkacz J Zieliński	6	6					H Hurkacz J Zieliński	6	6
		S Walków I Zelenay	3	3																			H Hurkacz J Zieliński	7	6
		I Sabanov M Sabanov	3	6	[10]																		H Nys A Rinderknech	5	3
	WC	D Added U Humbert	6	3	[8]				I Sabanov M Sabanov	3	4
		H Nys A Rinderknech	6	7					H Nys A Rinderknech	6	6
	4	L Saville J-P Smith	3	5												H Nys A Rinderknech	6	77
	Alt	H Reese S Verbeek	6	3	[10]										2	T Brkić N Ćaćić	3	63
		J O'Mara D Sharan	3	6	[8]			Alt	H Reese S Verbeek	3	3
		M Giron A Olivetti	4	77	[1]			2	T Brkić N Ćaćić	6	6
	2	T Brkić N Ćaćić	6	63	[10]

• Main Draw