Will Skelton and Wycliff Palu will miss the rest of the World Cup due to injuries sustained against Uruguay.
Lock Skelton suffered a pectoral injury and No 8 Palu a hamstring injury at Villa Park last Sunday.
Wallabies coach Michael Cheika has called up James Hanson from Australia to replace Palu, giving the squad three specialist hookers.
Lock Sam Carter, who was a regular Wallabies starter before suffering a knee injury during the Super Rugby season, will come in for Skelton.
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