The 1970 South African Open was a combined men's and women's tennis tournament played on outdoor hard courts at Ellis Park in Johannesburg, South Africa. It was an independent tournament that was not part of either of the two main tennis circuits; the 1970 Pepsi-Cola Grand Prix circuit and the 1970 World Championship Tennis circuit. It was the 67th edition of the tournament and was held from 24 March through 4 April 1970. Owen Williams was the tournament director. Rod Laver and Margaret Court won the singles titles.
|1970 South African Open|
|Date||24 March – 4 April|
|Draw||32S / 32D|
|Surface||Hard / outdoor|
|Location||Johannesburg, South Africa|
|Venue||Ellis Park Tennis Stadium|
|Bob Hewitt / Frew McMillan|
|Billie Jean King / Rosie Casals|
|Margaret Court / Marty Riessen|
- "1970 Johannesburg Men's Singles draw". Association of Tennis Professionals (ATP).
- John Barrett, ed. (1971). World of Tennis '71. London: Queen Anne Press. pp. 121–124. ISBN 978-0-362-00091-7.
- "Laver Routs Foe, Wins Tennis Title". The Morning Record. 4 April 1970 – via Google News Archive.
- "Laver Captures So. Africa Title". The New York Times. 4 April 1970.