Australia head coach Michael Cheika plans to use all of his players in their opening two group games - before matches against England and Wales.
Cheika has named a strong side to face Fiji on Wednesday.
Scrum-half Will Genia starts, as does Israel Folau and star open-side flankers Michael Hooper and David Pocock.
Former Leinster boss Cheika says it's important his whole squad gets involvement in the tournament early on.
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