Lock Victor Matfield is over his injury problems and will rejoin the Springbok squad when they get together for the Australasian leg of the Rugby Championship, while Marcel van der Merwe has been called up for the injured Frans Malherbe.
Furthermore, Willem Alberts has also been drafted back into the squad, pending a fitness test on Thursday when the squad gets together in Johannesburg.
Both Alberts and Matfield were part of the initial 30-man squad, but missed out on the victories over Argentina in Pretoria and Salta because of injury.
Van der Merwe will join the rest of the touring party in Johannesburg tomorrow. Malherbe will have to undergo surgery on his fractured ankle and is likely to miss the rest of the season because of this injury.
With Matfield and Alberts, if passed fit, returning for the two-week tour to Australia and New Zealand, Warren Whiteley and Juan Smith will drop out. Smith, however, will remain on standby if Alberts is deemed unable to tour.
"Victor is over his injury and has been declared fit to travel with us for the next two Tests, while we're awaiting a final verdict on Willem," said Springbok coach Heyneke Meyer.
The Springboks returned from Argentina on Monday and will enjoy a short break before reconvening in Johannesburg on Thursday. They are scheduled to depart for Perth on Saturday.
Forwards: Willem Alberts, Bakkies Botha, Schalk Brits, Marcell Coetzee, Lodewyk de Jager, Bismarck du Plessis, Jannie du Plessis, Eben Etzebeth, Francois Louw, Victor Matfield, Teboho Mohoje, Tendai Mtawarira, Trevor Nyakane, GurthrÃ¶ Steenkamp, Adriaan Strauss, Marcel van der Merwe, Duane Vermeulen.
Backs: Damian de Allende, Jean de Villiers (c), Bryan Habana, Cornal Hendricks, Francois Hougaard, Patrick Lambie, Willie le Roux, Lwazi Mvovo, Ruan Pienaar, HandrÃ© Pollard, Cobus Reinach, Jan Serfontein, MornÃ© Steyn.