Lions captain Sam Warburton has been ruled out of the final test this weekend.

A scan today has confirmed that he has suffered a 'significant' hamstring tear in the loss on Saturday.

Sean O' Brien is a potential replacement in the back row while Brian O' Driscoll is expected to take over captaincy duties.

The Lions came up just short against the Wallabies in the second test in Melbourne.

©INPHO/Dan Sheridan