# 1979 ATP Buenos Aires – Singles

Guillermo Vilas defeated José Luis Clerc 6–1, 6–2, 6–1 to win the 1979 ATP Buenos Aires singles competition. José Luis Clerc 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)
* José Higueras (quarterfinals)
* Víctor Pecci, Sr. (first round)
* Eddie Dibbs (semifinals)
* Hans Gildemeister (second round)
* José Luis Clerc (final)
* Ivan Lendl (semifinals)
* Tomáš Šmíd (quarterfinals)

## Draw
### Key

* Q - Qualifier
* 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 | 6 | 6 | | |
| 6 | José Luis Clerc | 1 | 2 | 1 | | |

### 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 | 6 | 6 | | | | | | | | | | | | | |
| | B Prajoux | 3 | 4 | | 1 | G Vilas | 7 | 7 | | | | | | | | |
| | P Kronk | 2 | 6 | | | C Gattiker | 5 | 6 | | | | | | | | |
| | C Gattiker | 6 | 7 | | | | | | 1 | G Vilas | 6 | 6 | | | | |
| | F Luna | 2 | 4 | | | | | | 8 | T Šmíd | 1 | 2 | | | | |
| | C Lewis | 6 | 6 | | | C Lewis | 1 | 4 | | | | | | | | |
| Q | Á Giménez | 2 | 2 | | 8 | T Šmíd | 6 | 6 | | | | | | | | |
| 8 | T Šmíd | 6 | 6 | | | | | | | | | | 1 | G Vilas | 6 | 6 |
| 4 | E Dibbs | 5 | 6 | 6 | | | | | | | | | 4 | E Dibbs | 1 | 1 |
| | R Cano | 7 | 1 | 2 | 4 | E Dibbs | 6 | 6 | | | | | | | | |
| | C Kirmayr | 6 | 7 | | | C Kirmayr | 2 | 3 | | | | | | | | |
| | R Fagel | 2 | 5 | | | | | | 4 | E Dibbs | 6 | 6 | | | | |
| Q | P Rebolledo | 3 | 4 | | | | | | | B Taróczy | 4 | 4 | | | | |
| | B Taróczy | 6 | 6 | | | B Taróczy | 6 | 6 | | | | | | | | |
| | C Owens | 7 | 2 | 3 | 5 | H Gildemeister | 1 | 2 | | | | | | | | |
| 5 | H Gildemeister | 6 | 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 | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 6 | J-L Clerc | 6 | 6 | | | | | | | | | | | | | | | |
| | J Velasco, Sr. | 2 | 4 | | 6 | J-L Clerc | 6 | 6 | | | | | | | | | | |
| | R Gehring | 6 | 6 | | | R Gehring | 2 | 2 | | | | | | | | | | |
| | T Koch | 1 | 1 | | | | | | | 6 | J-L Clerc | 6 | 6 | | | | | |
| | T Moor | 6 | 6 | | | | | | | | T Moor | 4 | 1 | | | | | |
| Q | A Gattiker | 1 | 1 | | | T Moor | 6 | 6 | 8 | | | | | | | | | |
| | P McNamara | 6 | 6 | | | P McNamara | 7 | 4 | 6 | | | | | | | | | |
| 3 | V Pecci, Sr. | 3 | 4 | | | | | | | | | | | 6 | J-L Clerc | 6 | 3 | 6 |
| 7 | I Lendl | 6 | 6 | | | | | | | | | | | 7 | I Lendl | 3 | 6 | 4 |
| Q | R Argüello | 3 | 2 | | 7 | I Lendl | 6 | 7 | 6 | | | | | | | | | |
| | A Pierola | 6 | 6 | | | A Pierola | 7 | 5 | 4 | | | | | | | | | |
| | R Frawley | 1 | 3 | | | | | | | 7 | I Lendl | 6 | 6 | | | | | |
| | F Dalla Fontana | 6 | 2 | 6 | | | | | | 2 | J Higueras | 2 | 2 | | | | | |
| | A Gómez | 3 | 6 | 8 | | A Gómez | 3 | 3 | | | | | | | | | | |
| | C Motta | 1 | 3 | | 2 | J Higueras | 6 | 6 | | | | | | | | | | |
| 2 | J Higueras | 6 | 6 | | | | | | | | | | | | | | | |