Former grand slam tennis champion Bob Hewitt is scheduled to go on trial in Boksburg from Monday.
He faces two charges of rape and one of indecent assault.
Seventy-three-year-old Hewitt, who resides in Addo in the Eastern Cape, was charged in 2013 with the rape of a girl at Sun City in 1981and in Boksburg in 1982.
The indecent assault charge relates to the alleged sexual assault of a girl under 18 also in Boksburg in 1994.
Hewitt has denied the charges.