# 1976 South American Championships – Singles

Guillermo Vilas was the defending champion and won in the final 6–2, 6–2, 6–3 against Jaime Fillol.

## 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 (final)
* Paolo Bertolucci (semifinals)
* Víctor Pecci (quarterfinals)
* Željko Franulović (quarterfinals)
* Mark Cox (second round)
* José Higueras (quarterfinals)
* Ricardo Cano (quarterfinals)

## Draw
### Key

* Q = Qualifier
* WC = Wild card
* LL = Lucky loser
* Alt = Alternate
* SE = Special exempt
* PR = Protected ranking
* ITF = ITF entry
* JE = Junior exempt
* w/o = Walkover
* r = Retired
* d = Defaulted
* SR = Special ranking
* NB: The final was the best of 5 sets while all other rounds were the best of 3 sets.

### Final

| Final | Final | Final | Final | Final | Final | Final |
| 1 | Guillermo Vilas | 6 | 6 | 6 | | |
| 2 | Jaime Fillol | 2 | 2 | 3 | | |

### Section 1

| 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 |
| 1 | G Vilas | 6 | 6 | | | | | | | | | | | | | | | |
| | P Gorostiaga | 3 | 4 | | 1 | G Vilas | 6 | 6 | | | | | | | | | | |
| | J Pinto-Bravo | 4 | 6 | 6 | | J Pinto-Bravo | 1 | 3 | | | | | | | | | | |
| | Á Betancur | 6 | 3 | 2 | | | | | | 1 | G Vilas | 6 | 6 | | | | | |
| | H Kary | 6 | 6 | | | | | | | 7 | J Higueras | 3 | 4 | | | | | |
| | J Velasco, Sr. | 1 | 4 | | | H Kary | 2 | 0 | | | | | | | | | | |
| | T Fontana | 1 | 1 | | 7 | J Higueras | 6 | 6 | | | | | | | | | | |
| 7 | J Higueras | 6 | 6 | | | | | | | | | | | 1 | G Vilas | 6 | 6 | 6 |
| 3 | P Bertolucci | 4 | 7 | 6 | | | | | | | | | | 3 | P Bertolucci | 7 | 3 | 0 |
| | C Kirmayr | 6 | 5 | 1 | 3 | P Bertolucci | 3 | 6 | 6 | | | | | | | | | |
| | I Molina | 6 | 3 | 4 | | A Muñoz | 6 | 2 | 0 | | | | | | | | | |
| | A Muñoz | 2 | 6 | 6 | | | | | | 3 | P Bertolucci | 6 | 7 | | | | | |
| | P Rodríguez | 6 | 4 | 10 | | | | | | 5 | Ž Franulović | 4 | 5 | | | | | |
| | L Álvarez | 4 | 6 | 12 | | L Álvarez | 3 | 1 | | | | | | | | | | |
| | Á Fillol | 4 | 2 | | 5 | Ž Franulović | 6 | 6 | | | | | | | | | | |
| 5 | Ž Franulović | 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 |
| 6 | M Cox | 6 | 6 | 6 | | | | | | | | | | | | | | |
| | J Soares | 7 | 1 | 2 | 6 | M Cox | 6 | 4 | 6 | | | | | | | | | |
| | R Benavides | 7 | 2 | 1 | | T Koch | 3 | 6 | 8 | | | | | | | | | |
| | T Koch | 6 | 6 | 6 | | | | | | | T Koch | 3 | 6 | 6 | | | | |
| | H Varela | 2 | 6 | 4 | | | | | | 4 | V Pecci | 6 | 3 | 4 | | | | |
| | P Cornejo | 6 | 3 | 6 | | P Cornejo | 2 | 0 | | | | | | | | | | |
| | T Vázquez | 5 | 3 | | 4 | V Pecci | 6 | 6 | | | | | | | | | | |
| 4 | V Pecci | 7 | 6 | | | | | | | | | | | | | T Koch | 2 | 1 |
| 8 | R Cano | 4 | 6 | 6 | | | | | | | | | | | 2 | J Fillol | 6 | 6 |
| | E Caviglia | 6 | 4 | 2 | 8 | R Cano | 6 | 7 | | | | | | | | | | |
| | J Ganzábal | 7 | 6 | | | J Ganzábal | 1 | 6 | | | | | | | | | | |
| | E Mandarino | 6 | 2 | | | | | | | 8 | R Cano | 4 | 6 | 4 | | | | |
| | B Prajoux | 6 | 6 | | | | | | | 2 | J Fillol | 6 | 4 | 6 | | | | |
| | J Thamin | 3 | 1 | | | B Prajoux | 3 | 4 | | | | | | | | | | |
| | N Holmes | 7 | 3 | 3 | 2 | J Fillol | 6 | 6 | | | | | | | | | | |
| 2 | J Fillol | 5 | 6 | 6 | | | | | | | | | | | | | | |