Injured Worcester forwards Ryan Bower and flanker Zac Xiourouppa are both expected to miss the rest of the season.
Saracens and Bristol pick up wins in the Premiership Rugby Cup to keep their semi-final hopes alive.
Josh Adams watched Wales play Australia as a fan last year. On Saturday, he will be on Wales' left wing at the Principality Stadium.
Wales pick Worcester wing Josh Adams ahead of British and Irish Lions star Liam Williams for Saturday's Test against Australia.
Audio & Video
England and Worcester centre Ben Te'o says his injury problems of the past year left him contemplating his future in the sport.
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