2025 Rio Open – Singles

Defending champion Sebastián Báez^[1] defeated Alexandre Müller in the final, 6–2, 6–3 to win the singles tennis title at the 2025 Rio Open. It was his seventh ATP Tour title. Báez was the first player to successfully defend the title and first to win multiple titles since the tournament's inception in 2014.^[2]

The quarterfinal match between Camilo Ugo Carabelli and Jaime Faria marked the second all-lucky loser quarterfinal in ATP Tour history (since 1990), after Max Purcell and Andreas Seppi at the 2021 Eastbourne International.^[3]

	Semifinals							Final
		Francisco Comesaña	5	77	3
		Alexandre Müller	7	63	6
									Alexandre Müller	2	3
								5	Sebastián Báez	6	6
	5	Sebastián Báez	3	6	6
	LL	Camilo Ugo Carabelli	6	1	1

	First round							Second round							Quarterfinals							Semifinals
	1	A Zverev	77	6
		Y Bu	64	4				1	A Zverev	77	78
		A Shevchenko	6	6					A Shevchenko	61	66
	WC	F Meligeni Alves	4	2											1	A Zverev	6	3	4
	WC	G Heide	62	79	3											F Comesaña	4	6	6
		F Comesaña	77	67	6				F Comesaña	77	61	78
	Q	JM Cerúndolo	6	3	4			6	N Jarry	64	77	66
	6	N Jarry	4	6	6																		F Comesaña	5	77	3
	4	F Cerúndolo	711	6																			A Müller	7	63	6
		H Gaston	69	0				4	F Cerúndolo	61	6	6
		L Darderi	77	2					L Darderi	77	3	2
	Q	H Dellien	62	2r											4	F Cerúndolo	5	1
	SE	J Fonseca	1	64												A Müller	7	6
		A Müller	6	77					A Müller	7	77
		C Moutet	3	61				8	TM Etcheverry	5	65
	8	TM Etcheverry	6	77

	First round							Second round							Quarterfinals							Semifinals
	5	S Báez	6	7
	LL	RA Burruchaga	3	5				5	S Báez	6	1	6
		M Navone	6	6					M Navone	4	6	3
		R Carballés Baena	4	3											5	S Báez	6	6
		F Díaz Acosta	6	3	63										Q	C-h Tseng	4	1
	WC	T Monteiro	3	6	77			WC	T Monteiro	77	3	64
	Q	C-h Tseng	6	7				Q	C-h Tseng	64	6	77
	3	A Tabilo	2	5																		5	S Báez	3	6	6
	7	P Martínez	6	3	3																	LL	C Ugo Carabelli	6	1	1
	LL	C Ugo Carabelli	4	6	6			LL	C Ugo Carabelli	6	6
		D Lajović	3	4					D Džumhur	4	4
		D Džumhur	6	6											LL	C Ugo Carabelli	77	6
		J Munar	6	3	6										LL	J Faria	65	4
		T Seyboth Wild	4	6	0				J Munar	4	6	3
	Q	T Barrios Vera	2	5				LL	J Faria	6	2	6
	LL	J Faria	6	7

	First round							Qualifying competition
	1	Camilo Ugo Carabelli	6	4	6
	WC	Karue Sell	4	6	4
								1	Camilo Ugo Carabelli	7	2	612
									Tomás Barrios Vera	5	6	714
		Tomás Barrios Vera	6	6
	8	Cristian Garín	4	3

	First round							Qualifying competition
	2	Yannick Hanfmann	4	3
		Marco Trungelliti	6	6
									Marco Trungelliti	77	0	4
								6	Tseng Chun-hsin	65	6	6
	WC	João Lucas Reis da Silva	77	3	4
	6	Tseng Chun-hsin	60	6	6

	First round							Qualifying competition
	3	Jaime Faria	7	77
	WC	Mateus Alves	5	64
								3	Jaime Faria	7	4	4
									Juan Manuel Cerúndolo	5	6	6
		Juan Manuel Cerúndolo	6	6
	7	Thiago Agustín Tirante	1	4

	First round							Qualifying competition
	4	Hugo Dellien	6	6
	Alt	Juan Pablo Ficovich	4	0
								4	Hugo Dellien	6	1	6
									Román Andrés Burruchaga	3	6	1
		Román Andrés Burruchaga	2	6	6
	5	Federico Coria	6	1	4

• Main draw
• Qualifying draw