Perth - Australia coach Michael Cheika on Friday confirmed his reserve players for Saturday's Rugby Championship Test against Argentina, dropping wing Henry Speight to set up a 6-2 split of forward and backs on the bench.
The match will likely provide Test debuts off the reserves bench for Waratahs prop Tom Robertson and Melbourne Rebels backrower Lopeti Timani.
Starting lock Dean Mumm is set to play his 50th Test on Saturday after making his debut in 2008 against Ireland in Melbourne.
On Thursday, Cheika made just one starting change for the match, returning lock Rob Simmons to the side. The Wallabies are coming off a 23-17 win over South Africa last Saturday in Brisbane which ended a six-match losing streak.
Simmons last played in Australia's tournament-opening loss to New Zealand on August 20.
Argentina made four changes to the side which lost 57-22 to the All Blacks last Saturday in Hamilton, New Zealand.
Brumbies scrumhalf Tomas Cubelli earns his first start for Argentina since last year's Rugby World Cup, while Juan Manuel Leguizamon returns at blindside flank after recovering from a leg injury.
Santiago Gonzalez Iglesias replaces injured centre Juan Martin Hernandez, while Javier Ortega Desio moves to lock to replace the injured Guido Petti.
"It really hurt," Cubelli said of his side's 29-15 semi-final loss to Australia at the World Cup at Twickenham.
"We knew it was a great (Wallabies) team, but we thought that we could win that game. (But) they were more efficient, their defence, and some of their kicking game was better."
15 Israel Folau, 14 Dane Haylett-Petty, 13 Samu Kerevi, 12 Bernard Foley, 11 Reece Hodge, 10 Quade Cooper, 9 Will Genia, 8 David Pocock, 7 Michael Hooper, 6 Dean Mumm, 5 Adam Coleman, 4 Rob Simmons, 3 Sekope Kepu, 2 Stephen Moore (captain), 1 Scott Sio
Substitutes: 16 Tatafu Polota-Nau, 17 James Slipper, 18 Tom Robertson, 19 Rory Arnold, 20 Lopeti Timani, 21 Sean McMahon, 22 Nick Phipps, 23 Tevita Kuridrani
15 Joaquín Tuculet, 14 Santiago Cordero, 13 Matías Moroni, 12 Santiago González Iglesias, 11 Lucas González Amorosino, 10 Nicolás Sánchez, 9 Tomás Cubelli, 8 Facundo Isa, 7 Juan Manuel Leguizamon, 6 Pablo Matera, 5 Matías Alemanno, 4 Javier Ortega Desio, 3 Ramiro Herrera, 2 Agustín Creevy (captain), 1 Nahuel Tetaz Chaparro
Substitutes: 16 Julian Montoya, 17 Lucas Noguera, 18 Enrique Pieretto, 19 Marcos Kremer, 20 Leonardo Senatore, 21 Martín Landajo, 22 Gabriel Ascarate, 23 Matías Orlando