The new Glasgow signing scored the winning try in last weekend's 27-25 victory in Puerto Madryn.
The match will be played at Velez Sarsfield's Jose Amalfitani stadium.
Argentina team to face Wales in the second Test: Juan Martin Hernandez; Francisco Leonelli, Gonzalo Tiesi, Felipe Contepomi, Lucas Borges; Federico Todeschini, Agustin Pichot (c); Rodrigo Roncero, Mario Ledesma, Martin Scelzo, Ignacio Fernandez Lobbe, Rimas Alvarez, Juan Martin Fernandez Lobbe, Martin Durand, Gonzalo Longo.
Replacements: Pablo Gambarini, Marcos Ayerza, Manuel Carizza, Martin Schuterman, Nicolas Fernandez Miranda, José María Núñez Piossek, Federico Serra.