Bloemfontein - Waratahs fullback Sam Norton-Knight has been ruled out of this afternoon's Super 14 clash with the Cheetahs in Bloemfontein with a back injury.
Norton-Knight was named on the bench for the round twelve encounter, however was unable to complete the Captain's Run at Grey College in Bloemfontein after suffering a back spasm.
Randwick centre Matt Carraro has been called into the squad to replace Norton-Knight.
Waratahs: Lachie Turner; Peter Playford, Timana Tahu, Kurtley Beale, Lote Tuqiri; Daniel Halangahu, Brett Sheehan; Wycliff Palu, Phil Waugh (c), Ben Mowen, Will Caldwell, Dean Mumm, Al Baxter, Tatafu Polota-Nau, Benn Robinson.
Reserves: Damien Fitzpatrick, Sekope Kepu, Chris Thomson, Luke Doherty, Luke Burgess, Matt Carraro, Tom Carter.