CARDIFF: Anthony Fainga'a is in line to replace Rob Horne in Australia's starting line-up for Saturday's (Sunday AM AEDT) Test against Wales in Cardiff.

Outside centre Horne pulled up with hamstring tightness at Thursday's training session outside of Swansea.

Hamstrung ... Rob Horne. Credit:Getty Images

Fainga'a is expected to be elevated off the bench with halfback Nick Phipps coming into the squad of 22.

Horne, 22, will be given until Friday morning to prove his fitness but it is unlikely the Wallabies will risk him considering his history of hamstring problems.