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Teddington - Australia gave key No 8 David Pocock a final chance to prove his fitness on Friday before naming a team for the Rugby World Cup semi-final against Argentina.
"He has improved and did a little bit extra this week. We will watch him on the paddock and hope he does a full session later," said coach Michael Cheika explaining a delay in naming his starting XV for Sunday's game.
Pocock injured a calf muscle in Australia's final Pool A win over Wales and missed the quarter-final victory over Scotland.
The two-time champions also have doubts about star fullback Israel Folau who has an ankle injury and prop Scott Sio who hurt an elbow against Scotland.
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How will the Springboks fare in their three end of year tour Tests against England, Italy and Wales?
Victory in all 3 Tests!
Will beat England and lose the rest
Will beat England and Italy and lose to Wales
Will beat England and Wales and lose to Italy
Will lose to England and beat the rest
Will lose to England and Italy and beat Wales
Will lose to England and Wales and beat Italy
Will lose all 3 Tests!