World Rugby has suspended Australia flanker Michael Hooper for one week after he admitted an offence of foul play.
Hooper charged into England full-back Mike Brown without the use of arms or grasping the player during the Wallabies' 33-13 victory over England on Saturday.
His suspension means that he will miss the Pool A showdown with Wales at Twickenham on Saturday which will decide who finishes top of the group.
Australia might also be without full-back Israel Folau after he picked up an ankle injury against England.
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