Wales centre Jonathan Davies is set to miss the 2018 Six Nations after being ruled out for six months by a foot injury suffered in defeat by Australia.
The British and Irish Lions player suffered the injury as Saturday's game drew to a close in Cardiff.
Harlequins centre Jamie Roberts has been added to the squad along with prop Scott Andrews.
Davies is to have surgery and Wales said: "It is envisaged that recovery will be in the region of six months."
That timescale could mean Davies' domestic season has already ended for Wales and Scarlets.
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