2024 Lisboa Belém Open – Men's singles

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

Alexander Ritschard won the title after defeating Raphaël Collignon 6–3, 6–7^(3–7), 6–3 in the final.^[2]

	Semifinals							Final
		Raphaël Collignon	62	6	6
	LL	Elmer Møller	77	2	4
									Raphaël Collignon	3	77	3
								7	Alexander Ritschard	6	63	6
		Emilio Nava	63	0
	7	Alexander Ritschard	77	6

	First round							Second round							Quarterfinals							Semifinals
	LL	Sandro Kopp	3	3
		M Dodig	6	6					M Dodig	6	2	1
	Q	D Rincón	62	4					Z Piros	3	6	6
		Z Piros	77	6												Z Piros	1	0
		R Collignon	7	6												R Collignon	6	6
	WC	G Elias	5	3					R Collignon	6	6
	Q	M Kližan	3	66				5	J Kovalík	3	3
	5	J Kovalík	6	78																			R Collignon	62	6	6
	4	TA Tirante	6	77																		LL	E Møller	77	2	4
	Q	E Dalla Valle	4	64				4	TA Tirante	6	6
	WC	F Ferreira Silva	4	6	6			WC	F Ferreira Silva	3	1
		T Skatov	6	2	2										4	TA Tirante	4	6	3
		O Roca Batalla	7	6											LL	E Møller	6	4	6
		J Faria	5	2					O Roca Batalla	3	0r
	LL	E Møller	6	6				LL	E Møller	6	1
	9	A Pellegrino	3	1

	First round							Second round							Quarterfinals							Semifinals
	8	DE Galán	62	6	64
	Q	G Fonio	77	4	77			Q	G Fonio	3	3
		E Nava	6	6					E Nava	6	6
		V Gaubas	4	3												E Nava	6	6
	Alt	F Arnaboldi	77	6												H Rocha	1	2
	WC	D Vale	65	1				Alt	F Arnaboldi	2	6	0
		H Rocha	77	6					H Rocha	6	2	6
	3	T Seyboth Wild	64	3																			E Nava	63	0
	7	A Ritschard	7	4	6																	7	A Ritschard	77	6
		A Géa	5	6	4			7	A Ritschard	6	6
	Q	D Novak	64	6	3			SE	L Pavlovic	1	1
	SE	Luka Pavlovic	77	3	6										7	A Ritschard	6	4	6
	LL	A Andreev	6	3	4											T Barrios Vera	3	6	2
	Q	C Tabur	3	6	6			Q	C Tabur	3	2
		T Barrios Vera	4	6	77				T Barrios Vera	6	6
	2	D Altmaier	6	4	65

• Main draw
• Qualifying draw