1970 South American Open Championships
| 1970 South American Open | |
|---|---|
| Date | October 31 – November 8 |
| Edition | 3rd |
| Category | Grand Prix |
| Draw | 32S / 32D |
| Surface | Clay / Outdoor |
| Location | Buenos Aires, Argentina |
| Champions | |
| Singles | |
 Željko Franulović [1] | |
| Doubles | |
 Bob Carmichael / Ray Ruffels [2] | |
The 1970 South American Open Championships was a men's tennis tournament that was part of the 1970 Pepsi-Cola Grand Prix and held in Buenos Aires, Argentina. It was the third edition of the tournament and ran from October 31 through November 8, 1970. It was played on outdoor clay courts.
Winners
Men's Singles
Željko Franulović defeated 
Manuel Orantes 6–4, 6–2, 6–0 [1]
- It was Franulovic's 3rd ATP title of the year and the 4th of his ATP career.
Men's Doubles
Bob Carmichael / Ray Ruffels defeated Željko Franulović / 
Jan Kodeš 7–5, 6–2, 5–7, 6–7, 6–3 [2]
- It was Carmichael's only ATP title of the year and the 1st of his ATP career. It was Ruffels's 3rd ATP title of the year and the 3rd of his ATP career.