2021 Aberto da República – Men's singles

This was the first edition of the tournament.^[1]

Men's singles
2021 Aberto da República
Champion	Federico Coria
Runner-up	Jaume Munar
Score	7–5, 6–3

Main article: 2021 Aberto da República

Federico Coria won the title after defeating Jaume Munar 7–5, 6–3 in the final.

Seeds

1. Federico Coria (champion)
2. Jaume Munar (final)
3. Sebastián Báez (withdrew)
4. Francisco Cerúndolo (semifinals, retired)
5. Hugo Dellien (second round)
6. Tomás Martín Etcheverry (first round)
7. Thiago Seyboth Wild (quarterfinals)
8. Juan Ignacio Londero (quarterfinals)

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
	1	Federico Coria	6	2
	4	Francisco Cerúndolo	1	1r
								1	Federico Coria	7	6
								2	Jaume Munar	5	3
		Pedro Cachin	3	77	3
	2	Jaume Munar	6	62	6

Top half

	First round							Second round							Quarterfinals							Semifinals
	1	F Coria	6	79
	Q	L Darderi	3	67				1	F Coria	6	77
	WC	Wilson Leite	6	6				WC	W Leite	4	65
		A Collarini	4	4											1	F Coria	712	6
		F Meligeni Alves	4	6	2										8	JI Londero	610	4
		P Sakamoto	6	3	0r				F Meligeni Alves	4	66
		J Nikles	4	4				8	JI Londero	6	78
	8	JI Londero	6	6																		1	F Coria	6	2
	4	F Cerúndolo	6	6																		4	F Cerúndolo	1	1r
	LL	J Pereira	2	1				4	F Cerúndolo	5	6	6
		GA Olivieri	2	6	6				GA Olivieri	7	3	4
		M Pucinelli de Almeida	6	2	4										4	F Cerúndolo	77	6
	WC	G Heide	7	1	5											H Casanova	63	4
		H Casanova	5	6	7				H Casanova	6	6
		N Jarry	3	6	5			5	H Dellien	4	4
	5	H Dellien	6	3	7

Bottom half

	First round							Second round							Quarterfinals							Semifinals
	6	TM Etcheverry	6	64	4
		N Kicker	4	77	6				N Kicker	77	78
		JP Ficovich	6	3					JP Ficovich	65	66
		O Luz	4	0r												N Kicker	63	4
		P Cachin	7	7												P Cachin	77	6
	WC	M Alves	5	5					P Cachin	3	6	77
		Gilbert Klier Júnior	6	77					G Klier Júnior	6	3	65
	Q	A Gómez	3	64																			P Cachin	3	77	3
	7	T Seyboth Wild	77	6																		2	J Munar	6	62	6
		F Díaz Acosta	61	3				7	T Seyboth Wild	77	5	4
	Q	B Bobrov	3	63					N Álvarez Varona	64	7	2r
		N Álvarez Varona	6	77											7	T Seyboth Wild	1	6	4
	Q	T Lipovšek Puches	1	0											2	J Munar	6	3	6
		S Rodríguez Taverna	6	6					S Rodríguez Taverna	6	2	1
	Alt	A González	2	6	3			2	J Munar	4	6	6
	2	J Munar	6	3	6