2023 Open de Oeiras II – Singles

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

Singles
2023 Open de Oeiras II
Champion	Facundo Díaz Acosta
Runner-up	Aleksandar Vukic
Score	6–4, 6–3

Main article: 2023 Open de Oeiras II

Facundo Díaz Acosta won the title after defeating Aleksandar Vukic 6–4, 6–3 in the final.

Seeds

1. Pedro Cachin (quarterfinals)
2. Hugo Gaston (first round, retired)
3. Radu Albot (quarterfinals)
4. Emilio Gómez (first round)
5. Facundo Bagnis (first round)
6. Aleksandar Vukic (final)
7. Facundo Díaz Acosta (champion)
8. Rinky Hijikata (first round)

Draw

Key

• Q = Qualifier
• WC = Wild card
• LL = Lucky loser
• Alt = Alternate
• ITF = ITF entry
• PR = Protected ranking
• SR = Special ranking
• SE = Special exempt
• JE = Junior exempt
• JR = Junior Accelerator Programme entrant
• CO = College Accelerator Programme entrant
• NG = Next Gen Accelerator Program entrant
• w/o = Walkover
• r = Retired
• d = Defaulted

Finals

	Semifinals							Final
		Nicolas Moreno de Alboran	69	2
	7	Facundo Díaz Acosta	711	6
								7	Facundo Díaz Acosta	6	6
								6	Aleksandar Vukic	4	3
	6	Aleksandar Vukic	5	6	6
		Felipe Meligeni Alves	7	4	4

Top half

	First round							Second round							Quarterfinals							Semifinals
	1	P Cachin	5	77	6
	Q	E Ribeiro	7	65	3			1	P Cachin	6	6
		H Dellien	6	6					H Dellien	4	2
		I Gakhov	1	3											1	P Cachin	1	4
		N Moreno de Alboran	6	2	6											N Moreno de Alboran	6	6
	Alt	F Delbonis	2	6	1				N Moreno de Alboran	6	6
		S Johnson	1	77	6				S Johnson	3	0
	8	R Hijikata	6	63	1																		N Moreno de Alboran	69	2
	3	R Albot	6	6																		7	F Díaz Acosta	711	6
	Alt	A Andreev	1	3				3	R Albot	77	6
		J Choinski	6	4	6				J Choinski	63	4
	Q	A Giannessi	3	6	4										3	R Albot	2	2
	Q	U Blanch	6	77											7	F Díaz Acosta	6	6
	WC	P Sousa	2	64				Q	U Blanch	4	5
		Em Nava	1	63				7	F Díaz Acosta	6	7
	7	F Díaz Acosta	6	77

Bottom half

	First round							Second round							Quarterfinals							Semifinals
	6	A Vukic	77	6
	WC	F Ferreira Silva	63	3				6	A Vukic	6	4	6
		Gerard Campana Lee	6	6					G Campana Lee	4	6	3
	Q	M Guinard	3	2											6	A Vukic	7	6
		M Landaluce	5	1												A Ritschard	5	3
		A Ritschard	7	6					A Ritschard	6	6
	Q	M Valkusz	6	6				Q	M Valkusz	3	0
	4	E Gómez	0	1																		6	A Vukic	5	6	6
	5	F Bagnis	4	4																			F Meligeni Alves	7	4	4
		O Krutykh	6	6					O Krutykh	62	64
		F Meligeni Alves	6	6					F Meligeni Alves	77	77
		R Brancaccio	1	2												F Meligeni Alves	7	6
	WC	J Domingues	6	0	2											P Martínez	5	3
	Q	N Serdarušić	4	6	6			Q	N Serdarušić	3	65
		P Martínez	6	3					P Martínez	6	77
	2	H Gaston	3	0r