1977 ATP Buenos Aires (November) – Singles
# 1977 ATP Buenos Aires (November) – Singles

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.

* Guillermo Vilas (Champion)
* 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 | Final | Final | Final | Final | Final | Final |
| - | - | - | - | - | - | - |
| 1 | Guillermo Vilas | 6 | 7 | 3 | 6 | |
| 2 | Jaime Fillol Sr. | 2 | 5 | 6 | 3 | |

### Section 1

| First Round | First Round | First Round | First Round | First Round | Second Round | Second Round | Second Round | Second Round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | 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 | First Round | First Round | First Round | First Round | Second Round | Second Round | Second Round | Second Round | Second Round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals | 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 | | | | | | | | | | | | | | | | |
