1981 Buenos Aires Grand Prix tennis
| 1981 South American Championships | |
|---|---|
| Date | November 16 – |
| Edition | 15th |
| Category | Grand Prix circuit |
| Surface | Clay / outdoor |
| Location | Buenos Aires, Argentina |
| Champions | |
| Singles | |
 Ivan Lendl
|
|
| Doubles | |
 Marcos Hocevar / João Soares
|
|
The 1981 South American Championships was a men's tennis tournament held in Buenos Aires, Argentina. It was the 15th edition of the tournament and was played on outdoor clay courts. The tournament was part of the 1981 Volvo Grand Prix and started on November 16, 1981. Ivan Lendl won the singles title.
Ivan Lendl defeated 
Guillermo Vilas 6–2, 6–2
Marcos Hocevar / João Soares defeated 
Álvaro Fillol / Jaime Fillol 7–6, 6–7, 6–4
...
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