Dan Biggar, Josh Adams and Jonathan Davies all suffered injuries as Wales qualified for the World Cup quarter-finals by beating Fiji 29-17.
A big victory against Australia will count for little if Wales cannot also beat Fiji and Uruguay, Warren Gatland acknowledges.
Wales clung on to beat Australia in a key Pool D clash at the Rugby World Cup with Warren Gatland suggesting previous teams would have lost.
Wales have called up experienced lock Bradley Davies in place of the injured Cory Hill, who will play no part in the Rugby World Cup.
Gareth Davies put in an inspired first-half display as Wales got their Rugby World Cup up and running with a 43-14 triumph over Georgia.
Alun Wyn Jones has been lauded by Wales coach Warren Gatland as he prepares to rack up a landmark appearance against Georgia.
Rob Howley's departure from the Wales camp has threatened to put their Rugby World Cup preparations in a state of flux.
Wales have rung the changes against Ireland as they finish preparations for the Rugby World Cup.
Warren Gatland has named his 31-man Wales squad for the Rugby World Cup, with Rob Evans and Samson Lee surprise omissions.