Guillermo Vilas defeated Jaime Fillol Sr. 6–2, 7–5, 3–6, 6–3 to win the November 1977 ATP Buenos Aires singles competition. Vilas was the defending champion.

Seeds

A champion seed is indicated in bold text while text in italics indicates the round in which that seed was eliminated.

1. Guillermo Vilas (Champion)
2. Jaime Fillol Sr. (Final)

Draw

• NB: All rounds up to but not including the final were the best of 3 sets. The final was the best of 5 sets.

Final

	Final
	1	Guillermo Vilas	6	7	3	6
	2	Jaime Fillol Sr.	2	5	6	3

Section 1

	First Round							Second Round							Quarterfinals							Semifinals
	1	G Vilas	7	6
		É Deblicker	6	2				1	G Vilas	6	6
		I Molina	6	2	11				I Molina	3	0
		C Landó	4	6	9										1	G Vilas	6	6
		L Álvarez	2	6												B Prajoux	3	2
		I Țiriac	6	7					I Țiriac	6	5
		B Prajoux	6	6					B Prajoux	7	7
		G Goven	4	4																		1	G Vilas	7	6
		H Gildemeister	7	6																			H Gildemeister	6	4
		J Soler	6	4					H Gildemeister	6	6
		H Bunis	7	7					H Bunis	3	0
		B Manson	6	5												H Gildemeister	6	6
		P McNamee	6	6												M Fishbach	2	2
		Á Betancur	2	4					P McNamee	4	4
		J Andrew	4	4					M Fishbach	6	6
		M Fishbach	6	6

Section 2

	First Round							Second Round							Quarterfinals							Semifinals
		V Pecci Sr.	4	6	6
		J Velasco Sr.	6	2	3				V Pecci Sr.	6	6
		O Parun	1	6	3				Z Guerry	3	2
		Z Guerry	6	3	6											V Pecci Sr.	6	6	6
		G Mayer	6	6												G Mayer	3	7	1
		A Muñoz	4	3					G Mayer	6	6
		E Caviglia	1	1					J Higueras	1	4
		J Higueras	6	6																			V Pecci Sr.	6	1	4
		R Cano	6	5	3																	2	J Fillol Sr.	4	6	6
		J Pinto-Bravo	4	7	6				J Pinto-Bravo	6	4	1
		P Cornejo	6	6	7				P Cornejo	4	6	6
		F Dalla Fontana	4	7	5											P Cornejo	1	0
		J L Clerc	5	6	3										2	J Fillol Sr.	6	6
		C Kirmayr	7	0	6				C Kirmayr	4	5
		R Benavides	4	6				2	J Fillol Sr.	6	7
	2	J Fillol Sr.	6	7

External links

• 1977 ATP Buenos Aires (November) draw