Australia sweat over Pocock
"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.
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Pocock injured a calf muscle in Australia's final Pool A win over Wales and missed the quarterfinal 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.
Agence France-Presse