Singles
2021 Challenger de Buenos Aires
Champion	Sebastián Báez
Runner-up	Thiago Monteiro
Score	6–4, 6–0

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

Sebastián Báez won the title after defeating Thiago Monteiro 6–4, 6–0 in the final.

Seeds

Draw

Finals

	Semifinals							Final
	1	Thiago Monteiro	6	2	6
	3	Francisco Cerúndolo	1	6	3
								1	Thiago Monteiro	4	0
								7	Sebastián Báez	6	6
	7	Sebastián Báez	6	6
	2	Juan Manuel Cerúndolo	1	2

Top half

	First round							Second round							Quarterfinals							Semifinals
	1	T Monteiro	79	3	6
		H Casanova	67	6	2			1	T Monteiro	6	6
		N Kicker	6	2	6				N Kicker	2	3
		N Álvarez	3	6	3										1	T Monteiro	6	3	7
		TA Tirante	4	0											8	TM Etcheverry	4	6	5
		R Olivo	6	6					R Olivo	6	61	4
	Q	Ignacio Monzón	0	3				8	TM Etcheverry	3	77	6
	8	TM Etcheverry	6	6																		1	T Monteiro	6	2	6
	3	F Cerúndolo	4	6	6																	3	F Cerúndolo	1	6	3
		C Ugo Carabelli	6	1	4			3	F Cerúndolo	7	6
		JP Ficovich	77	78					JP Ficovich	5	2
		N Sánchez Izquierdo	61	66											3	F Cerúndolo	6	6
	Q	M Cuevas	2	6	6										Q	M Cuevas	1	1
	Q	F Comesaña	6	3	2			Q	M Cuevas	77	7
	WC	M Navone	3	6	6			WC	M Navone	60	5
	6	T Seyboth Wild	6	1	2

Bottom half

	First round							Second round							Quarterfinals							Semifinals
	7	S Báez	3	6	6
		P Cachin	6	2	3			7	S Báez	6	6
	Q	C Gómez-Herrera	3	4					JI Londero	3	4
		JI Londero	6	6											7	S Báez	7	6
		S Rodríguez Taverna	6	1											4	JP Varillas	5	2
	WC	RA Burruchaga	4	4r					S Rodríguez Taverna	4	2
		N Hardt	3	6	2			4	JP Varillas	6	6
	4	JP Varillas	6	3	6																	7	S Báez	6	6
	5	H Dellien	4	6	6																	2	JM Cerúndolo	1	2
		F Díaz Acosta	6	0	1			5	H Dellien	3	7	78
	WC	JB Torres	2	4					F Meligeni Alves	6	5	66
		F Meligeni Alves	6	6											5	H Dellien	6	5	65
		GA Olivieri	2	6	5										2	JM Cerúndolo	2	7	77
		A Collarini	6	4	7				A Collarini	4	6	4
		G Andreozzi	4	2				2	JM Cerúndolo	6	3	6
	2	JM Cerúndolo	6	6

References

External links

• Main draw
• Qualifying draw