Singles
2021 Brest Challenger
Champion	Brandon Nakashima
Runner-up	João Sousa
Score	6–3, 6–3

Ugo Humbert was the defending champion^[1] but chose not to defend his title.

Brandon Nakashima won the title after defeating João Sousa 6–3, 6–3 in the final.

Seeds

Draw

Finals

	Semifinals							Final
		Alexandre Müller	2	5
	4	Brandon Nakashima	6	7
								4	Brandon Nakashima	6	6
									João Sousa	3	3
	Alt	Maxime Janvier	5	1
		João Sousa	7	6

Top half

	First round							Second round							Quarterfinals							Semifinals
	1/WC	A Rinderknech	4	2
	WC	M Guinard	6	6				WC	M Guinard	64	3
		F Horanský	3	3				WC	L Van Assche	77	6
	WC	L Van Assche	6	6											WC	L Van Assche	3	4
	Q	A Nedovyesov	3	6	62											A Müller	6	6
		A Müller	6	3	77				A Müller	77	1	6
		M Safwat	4	4				5	S Travaglia	64	6	1
	5	S Travaglia	6	6																			A Müller	2	5
	4	B Nakashima	6	77																		4	B Nakashima	6	7
	Q	Z Piros	3	64				4	B Nakashima	6	6
		F Verdasco	6	4	1				B Zapata Miralles	4	1
		B Zapata Miralles	3	6	6										4	B Nakashima	6	7
		H Rune	6	6											7	H Laaksonen	1	5
		Z Kolář	3	3					H Rune	4	4
		L Broady	1	5				7	H Laaksonen	6	6
	7	H Laaksonen	6	7

Bottom half

	First round							Second round							Quarterfinals							Semifinals
	8	H Gaston	6	6
		S Caruso	3	4				8	H Gaston	65	6	4
	LL	Valentin Royer	6	5	0			Alt	M Janvier	77	2	6
	Alt	M Janvier	3	7	6										Alt	M Janvier	w/o
		T Fabbiano	77	7											3	R Gasquet
	Q	A Vatutin	64	5					T Fabbiano	2	6	2
		J Lehečka	2	4				3	R Gasquet	6	4	6
	3	R Gasquet	6	6																		Alt	M Janvier	5	1
	6	P-H Herbert	4	6	3																		J Sousa	7	6
		F Gaio	6	3	6				F Gaio	4	77	6
		F Ferreira Silva	4	6	6				F Ferreira Silva	6	63	2
		A Hoang	6	4	4											F Gaio	3	77	65
		J Sousa	6	6												J Sousa	6	65	77
		H Grenier	4	1					J Sousa	6	78
	SE	C Taberner	65	65				Q	K de Schepper	4	66
	Q	K de Schepper	77	77

References

External links

• Main draw
• Qualifying draw