Singles
1970 ATP Buenos Aires
Champion	Željko Franulović
Runner-up	Manuel Orantes
Score	6–4, 6–2, 6–0

Željko Franulović defeated Manuel Orantes 6–4, 6–2, 6–0 to win the 1970 ATP Buenos Aires singles competition. François Jauffret was the champion but did not defend his title.

Draw

Final

	Final
		Željko Franulović	6	6	6
		Manuel Orantes	4	2	0

Section 1

	First round									Second round									Quarterfinals									Semifinals
		J Kodeš	6	6	6
		H Varela	3	3	0						J Kodeš	6	6	6
		J Mandarino	6	6	6						J Mandarino	1	2	1
			1	0	3															J Kodeš	6	6	0	6
		R Ruffels	6	6	6															R Ruffels	3	3	0	1
		R Cisneros	0	3	2						R Ruffels	6	6	6
		G Vilas	6	6	6						G Vilas	3	1	3
			2	4	3																								J Kodeš	2	2	2
		Z Franulović	6	6	6																								Z Franulović	6	6	6
			1	2	4						Z Franulović	6	6	7
		J Loyo-Mayo	6	7	6						J Loyo-Mayo	4	2	6
			1	6	3															Z Franulović	7	6	6
		J Fillol Sr.	6	6	5	6														J Kukal	5	0	1
		J Guerrero	3	2	7	2					J Fillol Sr.	3	4	4
		J Kukal	4	6	6	6					J Kukal	6	6	6
		R Aubone	6	3	3	1

Section 2

	First round									Second round									Quarterfinals									Semifinals
		J C Rodríguez	4	6	6	6
		H Romani	6	1	2	2					J C Rodríguez	3	7	2	1
		M Orantes	6	6	6						M Orantes	6	5	6	6
		R Cano	0	0	1															M Orantes	6	6
		P Cornejo	7	7	6															D Crealy	4	1
			5	5	4						P Cornejo	3	2	2
		D Crealy	6	6	6						D Crealy	6	6	6
			4	3	4																								M Orantes	5	6	6	6
		J Ganzábal	6	6	6																								B Carmichael	7	1	0	4
		N Romero	1	3	3						J Ganzábal	5	7	4	2
		B Carmichael	6	6	7						B Carmichael	7	5	6	6
		J Pinto Bravo	3	0	5															B Carmichael	7	4	6	6
		F Froehling	6	6	6															C Richey	6	6	4	3
		M Lynch	1	2	2						F Froehling	6	6	4	3
		C Richey	6	6	7						C Richey	7	4	6	6
		O Escribano	1	2	5

External links

• 1970 ATP Buenos Aires Singles draw