Australia have reinforced their squad with the addition of flanker George Smith, full-back Jesse Mogg and centre Ben Tapuai.
The Wallabies suffered a terrible succession of injuries in yesterday's 23-21 defeat by the British and Irish Lions but no one has been ruled out of Saturday's second Test in Melbourne.
Pat McCabe (neck), winger Digby Ioane (shoulder), centre Adam Ashley-Cooper (shoulder) and full-back Berrick Barnes (head knock) underwent scans and a decision on their availability will be made early in the week.
Inside centre Christian Leali'ifano, who was knocked out while tackling Jonathan Davies, will also be reviewed over the coming days.
Smith returns after being ruled out of the opening Test in Brisbane with a knee injury and his availability to face the Lions will be determined later in the week.
The 32-year-old breakdown specialist has 110 caps and returned to Australia this year on a short-term contract with the Brumbies.
The physical Tapuai, who has seven caps, last appeared for the Wallabies on last year's autumn tour to Europe and can play at inside or outside centre.
Uncapped Mogg has been in outstanding form for the Brumbies this season.