Argentina have made two changes to their back line and brought in a new second rower for their Rugby Championship Test against Australia on Saturday.

Racing Metro winger Juan Imhoff and dynamic youngster Manuel Montero come in to the starting side for Horacio Agulla and Lucas Gonzalez Amorosino respectively, while rookie second rower Matias Alemanno replaces the suspended Tomas Lavinini in the second row.

Retained: Argentina second-rower Mariano Galarza. Credit:AFP

Imhoff, 26, has scored 12 tries for the Pumas in 21 appearances, while Montero has scored a solid 13 tries from 15 Tests since his debut in 2012.

Alemanno was the starting second rower in Argentina's wins against Uruguay and Chile this year but will play his first Test against the Wallabies.