Doubles
2021 Brest Challenger
Final
Champions	Sadio Doumbia Fabien Reboul
Runners-up	Salvatore Caruso Federico Gaio
Score	4–6, 6–3, [10–3]
Events
Singles Doubles
← 2019 · Brest Challenger · 2022 →

Denys Molchanov and Andrei Vasilevski were the defending champions^[1] but only Molchanov chose to defend his title, partnering Aleksandr Nedovyesov. Molchanov lost in the semifinals to Sadio Doumbia and Fabien Reboul.

Doumbia and Reboul won the title after defeating Salvatore Caruso and Federico Gaio 4–6, 6–3, [10–3].

	First round							Quarterfinals							Semifinals							Final
	1	D Molchanov A Nedovyesov	6	7
		S Balaji D Sharan	3	5				1	D Molchanov A Nedovyesov	6	5	[11]
		F Ferreira Silva J Sousa	4	6	[10]				F Ferreira Silva J Sousa	2	7	[9]
	PR	F Cabral E Hoyt	6	1	[5]										1	D Molchanov A Nedovyesov	612	2
	4	S Doumbia F Reboul	6	6											4	S Doumbia F Reboul	714	6
		M Guinard A Hoang	0	3				4	S Doumbia F Reboul	4	79	[10]
		DN Mădăraș A Vatutin	3	4					L Broady L Johnson	6	67	[7]
		L Broady L Johnson	6	6																		4	S Doumbia F Reboul	4	6	[10]
		M Martineau Z Piros	4	5																			S Caruso F Gaio	6	3	[3]
		H Grenier A Müller	6	7					H Grenier A Müller	4	1
		J Cerretani F Fallert	63	3				3	Z Kolář D Vega Hernández	6	6
	3	Z Kolář D Vega Hernández	77	6											3	Z Kolář D Vega Hernández	5	5
		A Dougaz M Safwat	3	4												S Caruso F Gaio	7	7
		S Caruso F Gaio	6	6					S Caruso F Gaio	7	3	[10]
		N Monroe B Nakashima	6	6					N Monroe B Nakashima	5	6	[6]
	2	A Olivetti M Reid	4	4

• Main draw