Argentina head coach Daniel Hourcade has included Juan Pablo Orlandi in his 26-man squad to face South Africa in Durban.
The tighthead comes into the squad for the injured Ramiro Herrera, who requires knee surgery.
Argentina have confirmed that Herrera will require between four to six weeks to recover from his operation, keeping his Rugby World Cup hopes alive.
Los Pumas will regroup on Saturday, August 1 before their flight to South Africa.
"South Africa are an extremely strong team, who have the same ability as our previous two opponents but primarily base their game on contact, so it will be important to tackle, something we have failed with in the last two games," said Hourcade.
"We must prepare for a tough battle, improving individual our tackle and execution.
"South Africa is a great team who could have won the two games they played so far and lost in the final moments, so they will be an extremely tough opponent and we will benefit from facing a team like them."
Argentina squad to face South Africa:
Horacio Agulla, Matías Alemanno, Marcos Ayerza, Marcelo Bosch, Agustín Creevy, Tomás Cubelli, Jerónimo De la Fuente, Matías Díaz, Lucas González Amorosino, Santiago González Iglesias, Juan Martín Hernández, Juan Imhoff, Martín Landajo, Tomás Lavanini, Juan Manuel Leguizamón, Tomás Lezana, Benjamín Macome, Pablo Matera, Julián Montoya, Lucas Noguera, Juan Pablo Orlandi, Guido Petti Pagadizabal, Leonardo Senatore, Juan Pablo Socino, Nahuel Tetaz Chaparro, Joaquín Tuculet