Springbok centre Frans Steyn went for X-rays on his injured right ankle on Monday and has responded well to treatment ahead of Saturday's game.
Steyn injured his ankle during a warm-up drill on Monday and sat out Tuesday's training, with team doctor Craig Roberts explaining the situation.
"The X-rays were clear and the swelling has settled nicely. We are hoping to get him to do some training on Wednesday," he said.
Three more players did not train with the squad on Tuesday, and will be managed accordingly. They are Flip van der Merwe (calf), Jacques Potgieter (groin) and Lwazi Mvovo (hamstring).
A final call on the availability of these four players for Saturday's Test in the Rugby Championship, against Australia, will be made later in the week.
The three other players who did not train on Monday were back on the field on Tuesday - Tendai Mtawarira (stomach bug), Coenie Oosthuizen (muscle stiffness) and Johan Goosen (bruised heel).