Argentina have called up wing Bautista Delguy (25) for their second Rugby Championship clash with Australia, in San Juan on Saturday, but experienced flyhalf Nicolas Sanchez (33) has been released from the squad through injury.
The absence of Sanchez will likely see Santiago Carreras continue in the flyhalf berth, but coach Michael Cheika has called on Delguy to supply backline cover following the thumping 41-26 loss to the Wallabies in the Rugby Championship.
Argentina have also released prop Mayco Vivas, who recently became a father.
The Pumas led 19-10 at halftime in Mendoza on Saturday, but wilted under enormous pressure from Australia in the second period.