2021 Lisboa Belém Open – Men's singles

Men's singles
2021 Lisboa Belém Open
Final
Champion	Dmitry Popko
Runner-up	Andrea Pellegrino
Score	6–2, 6–4
Events
Singles men women Doubles men women
← 2020 · Lisboa Belém Open · 2022 →

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

Dmitry Popko won the title after defeating Andrea Pellegrino 6–2, 6–4 in the final.

	Semifinals							Final
		Andrea Pellegrino	77	1
	4	Andrej Martin	65	0r
									Andrea Pellegrino	2	4
								8	Dmitry Popko	6	6
	3	Hugo Gaston	3	4
	8	Dmitry Popko	6	6

	First round							Second round							Quarterfinals							Semifinals
	1	T Monteiro	6	6
		A Müller	4	4				1	T Monteiro	3	68
		I Sijsling	0	4					A Pellegrino	6	710
		A Pellegrino	6	6												A Pellegrino	6	6
		F Ferreira Silva	6	6												F Ferreira Silva	3	1
		T Lamasine	3	4					F Ferreira Silva	63	6	6
		G Zeppieri	4	6	6				G Zeppieri	77	4	0
	Q	S Rodríguez Taverna	6	3	4																		A Pellegrino	77	1
	4	A Martin	4	6	6																	4	A Martin	65	0r
		R Cid Subervi	6	4	0			4	A Martin	2	6	6
	WC	G Oliveira	77	6				WC	G Oliveira	6	4	3
	WC	Pedro Araújo	64	4											4	A Martin	6	6
	PR	E Benchetrit	2	2											5	N Milojević	4	4
		C Lestienne	6	6					C Lestienne	5	4
	Q	S Fanselow	4	4				5	N Milojević	7	6
	5	N Milojević	6	6

	First round							Second round							Quarterfinals							Semifinals
	6	C-M Stebe	6	6
	LL	J Berrettini	0	1				6	C-M Stebe	4	77	6
		M Geerts	6	3	4				N Borges	6	64	4
		N Borges	4	6	6										6	C-M Stebe	63	3r
		R Haase	6	4	6										3	H Gaston	77	4
		F Baldi	4	6	4				R Haase	6	65	3
		F Forti	3	1				3	H Gaston	4	77	6
	3	H Gaston	6	6																		3	H Gaston	3	4
	8	D Popko	1	6	4																	8	D Popko	6	6
		L Giustino	6	3	1r			8	D Popko	6	6
		A Arnaboldi	2	6	68			Q	B Hassan	2	4
	Q	B Hassan	6	3	710										8	D Popko	64	7	6
		J Domingues	6	6												J Domingues	77	5	0
	WC	T Cação	4	4					J Domingues	6	6
	Q	D Michalski	77	5	6			Q	D Michalski	2	2
	2	T Daniel	64	7	2

• Main draw
• Qualifying draw