Wallabies flyhalf Noah Lolesio has had surgery on an injury sustained against Fiji and will will miss the three-Test Series against the British and Irish Lions.
British and Irish Lions head coach Andy Farrell has made no less than 14 changes to his starting XV to take on the Brumbies in Canberra on Wednesday.
Wallabies skipper Harry Wilson came up with a clutch try for a narrow 21-18 win over Fiji in Newcastle on Sunday.
The Junior Springboks scored 11 tries in a convincing 73-17 victory over Australia in their World Rugby U20 Championship opener in Italy on Sunday.
British and Irish Lions coach Andy Farrell has rung the changes for their first game on tour in Australia, as they take on the Western Force in Perth on Saturday.
British and Irish Lions chief executive Ben Calveley has confirmed there is interest in future matches against new opponents but insists there are no plans to change the three traditional tours.