Wallabies No.8 Wycliff Palu has been ruled out of the start of the domestic Test season with a broken hand.
Palu is expected to be sidelined for a month, forcing him out of Australia's extended 30-man squad to be announced on Thursday in Sydney.
The 28-Test enforcer underwent scans on his left hand on Monday after returning from New South Wales Waratahs three-match tour of South Africa.
Palu fractured his hand for the second time this season in the 16-12 win over the Sharks but played in the 38-33 last-round win over the Lions, which he failed to finish.
His unavailability is a blow to the Wallabies, who start their season on June 6 against the Barbarians in Sydney before playing Italy twice and France.
Watch the Wallabies battle the Barbarians LIVE and un-interrupted on Fox Sports on June 6.
Palu is expected to be back in time for the Tri-Nations kick-off on July 18 against New Zealand but will have a major battle to wrest back the No.8 jersey from Richard Brown.
Western Force backrower Brown is almost certain to start at the back of the scrum, while Brumbies skipper Stephen Hoiles may receive a call-up to the 30-man squad in Palu's place.
His unavailability could also see in-form Waratahs captain Phil Waugh retained as one of three openside flankers with George Smith and David Pocock.
don't know the reasoning for that last statement. I would've thought possibly Mowen, Chapman, Hoiles, Hodgson possibly Higginbottham may more likely to benefit.