The South African Open – formerly known as the South African Championships, and for sponsorship reasons the Altech NCR South African Open and the Panasonic South African Open – is a defunct Grand Prix Tennis Tour, World Championship Series, ATP Tour and Virginia Slims Circuit affiliated tennis tournament played from 1891 to 2011 in South Africa. It was part of the pre-open era international seasonal tours from 1891 to 1967 from 1968 to 1971, part of the open era independent events tour from 1972, when it became part the men's Grand Prix Tour until 1989. The women's side of the competition was only briefly part of Virginia Slims tour (1970–74) before it returned to the independent circuit.