JP Pietersen has been called into the South Africa squad as a replacement for the injured Ruan Pienaar.
Scrum-half Pienaar injured his medical cruciate ligament during Saturday's 14-10 defeat to New Zealand in the Rugby Championship in Wellington.
He will now miss the remainder of the competition, so versatile back Pietersen will join up with the squad in Cape Town on Sunday.
"JP has always been part of our plans and did very well in June playing at outside centre," said coach Heyneke Meyer.
"We've got two scrum-halves in the squad in Francois Hougaard and Cobus Reinach and decided it would be better to bring in an outside back such as JP, who covers wing and outside centre."
The seriousness of Pienaar's injury has not yet been determined, with the 30-year-old due to have scans on Monday.