Former captain Stirling Mortlock has been ruled out of the Wallabies' grand slam tour of the United Kingdom and Ireland after aggravating his calf muscle.

Mortlock was due to fly out of Australia and join the squad in Dublin on Sunday for the last three Tests against Ireland, Scotland and Wales but re-injured his calf muscle during a training run.

It is a further blow to Robbie Deans' squad, which has already lost fellow centres Rob Horne and Berrick Barnes, leaving them desperately thin in the midfield.

The Wallabies are working on finding a replacement.

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