# 1972 ATP Buenos Aires – Singles

Karl Meiler defeated Guillermo Vilas 6–7, 2–6, 6–4, 6–4, 6–4 to win the 1972 ATP Buenos Aires singles competition. Željko Franulović was the champion but did not defend his title.

## 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

### Final

| Final | Final | Final | Final | Final | Final | Final |
| | Karl Meiler | 6 | 2 | 6 | 6 | 6 |
| | Guillermo Vilas | 7 | 6 | 4 | 4 | 4 |

### Section 1

| First round | First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals |
| | | | | | | B Phillips-Moore | 6 | 6 | 3 | 6 | 3 | | | | | | | | | | | | |
| J Singh | 6 | 6 | 7 | | | J Singh | 3 | 7 | 6 | 2 | 6 | | | | | | | | | | | | |
| N Herrero | 2 | 4 | 5 | | | | | | | | | J Singh | 6 | 7 | 5 | 4 | | | | | | | |
| | | | | | | | | | | | | K Meiler | 7 | 5 | 7 | 6 | | | | | | | |
| | | | | | | J Pinto Bravo | 2 | 5 | 1 | | | | | | | | | | | | | | |
| K Meiler | 6 | 6 | 6 | | | K Meiler | 6 | 7 | 6 | | | | | | | | | | | | | | |
| L Soriano | 3 | 0 | 4 | | | | | | | | | | | | | | | K Meiler | 7 | 5 | 6 | 6 | 6 |
| J Ganzábal | 6 | 6 | 6 | 6 | | | | | | | | | | | | | | J Ganzábal | 6 | 7 | 7 | 2 | 3 |
| C Junquet | 1 | 4 | 7 | 3 | | J Ganzábal | 2 | 7 | 6 | 2 | 6 | | | | | | | | | | | | |
| A Muñoz | 6 | 6 | 6 | | | A Muñoz | 6 | 6 | 1 | 6 | 2 | | | | | | | | | | | | |
| L Álvarez | 4 | 1 | 3 | | | | | | | | | J Ganzábal | 7 | 2 | 6 | 3 | 7 | | | | | | |
| O Parun | 6 | 6 | 6 | 5 | | | | | | | | O Parun | 5 | 6 | 4 | 6 | 5 | | | | | | |
| T Lynch | 7 | 3 | 1 | 2$^r$ | | O Parun | 6 | 6 | 2 | 6 | | | | | | | | | | | | | |
| R Cano | 2 | 2 | 6 | 6 | 6 | R Cano | 3 | 4 | 6 | 4 | | | | | | | | | | | | | |
| B Prajoux | 6 | 6 | 2 | 3 | 4 | | | | | | | | | | | | | | | | | | |

### Section 2

| First round | 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 |
| | | | | | | G Vilas | 6 | 6 | 6 | | | | | | | | | | |
| P Rodríguez | 2 | 6 | 0 | 6 | 4 | P Rodríguez | 2 | 1 | 4 | | | | | | | | | | |
| J Guerrero | 6 | 2 | 6 | 4 | 2$^r$ | | | | | | G Vilas | 6 | 7 | 6 | | | | | |
| | | | | | | | | | | | R Moore | 2 | 6 | 0 | | | | | |
| | | | | | | R Moore | 6 | 2 | 6 | 6 | | | | | | | | | |
| B Lloyd | 6 | 6 | 6 | | | B Lloyd | 2 | 6 | 3 | 0 | | | | | | | | | |
| O Escribano | 3 | 0 | 1 | | | | | | | | | | | | | G Vilas | 6 | 6 | 6 |
| | | | | | | | | | | | | | | | | J Fillol Sr. | 4 | 4 | 4 |
| | | | | | | J Kukal | 3 | 7 | 3 | 2 | | | | | | | | | |
| I Molina | 7 | 6 | 7 | | | I Molina | 6 | 6 | 6 | 6 | | | | | | | | | |
| V Pecci | 5 | 1 | 5 | | | | | | | | I Molina | 6 | 4 | 2 | 4 | | | | |
| | | | | | | | | | | | J Fillol Sr. | 3 | 6 | 6 | 6 | | | | |
| | | | | | | J Fillol Sr. | 6 | 7 | 6 | | | | | | | | | | |
| H Romani | 2 | 3 | 1 | | | H Romani | 2 | 6 | 0 | | | | | | | | | | |
| E Zuleta | 6 | 6 | 6 | | | | | | | | | | | | | | | | |