Springbok coach Heyneke Meyer has recalled Pieter-Steph du Toit and Juan de Jongh to his squad for their games against Australia and New Zealand.
21-year-old lock Du Toit was part of the Springbok squad in June but had to withdraw because of a sternum injury. He has completed his rehabilitation and has consequently played two full Currie Cup matches for The Sharks.
Centre De Jongh, who did not travel with the Springboks to Argentina, Australia and New Zealand, is back in the squad. He has been in solid form for Western Province in the Currie Cup.
"It's great to see Pieter-Steph back in action and I have to commend The Sharks for the good work they've done on getting him back to full match fitness," said Meyer.
"He has always been part of our long-term plans and we're looking forward to welcoming him back into the Springbok fold.
"Juan is an experienced player and will slot back into the squad with ease as we start our preparations for the Test against Australia at DHL Newlands on Saturday."
The Springbok squad will start preparing for the Test against Australia on Monday in Cape Town. The final round of the Rugby Championship is on 5 October against New Zealand at Ellis Park in Johannesburg.
The Springbok squad for their final two Rugby Championship Tests:
Forwards (17): Lourens Adriaanse, Willem Alberts, Marcell Coetzee, Bismarck du Plessis, Jannie du Plessis, Pieter-Steph du Toit, Eben Etzebeth, Siya Kolisi, JuandrÃ© Kruger, Francois Louw, Tendai Mtawarira, Coenie Oosthuizen, Chiliboy Ralepelle, GurthrÃ¶ Steenkamp, Adriaan Strauss, Flip van der Merwe, Duane Vermeulen.
Backs (13): Bjorn Basson, Juan de Jongh, Jean de Villiers (captain), Fourie du Preez, JJ Engelbrecht, Bryan Habana, Zane Kirchner, Patrick Lambie, Willie le Roux, Ruan Pienaar, Jan Serfontein, MornÃ© Steyn, Jano Vermaak.