Waratahs skipper Phil Waugh will miss this Saturday's game against the Force in Perth after injuring his calf at the weekend.
He had hoped to pull through ok, but coach Chris Hickey said Waugh would be taking time out to recover so as not to aggravate the injury into something worse.
Pat McCutcheon or Chris Alcock seem most likely to replace Waugh.
Berrick Barnes will also miss the game and was due to consult a neurologist today to undergo further testing after suffering concussion twice this season.