Veteran Matías Moroni was one of three changes made to the Argentina team announced on Wednesday by head coach Michael Cheika to play Samoa in the World Cup this weekend.
The 32-year-old, who is the only Pumas player to play in all six of their Tests this year, comes in at outside centre in place of Lucio Cinti, who drops to the bench compared to the team that lost 27-10 to 14-man England in their opener.
"Matías Moroni, since we arrived in Portugal [for a pre-tournament training camp] has always been in very good shape in training," said Cheika.
"This game is good for him, he is very strong in defence, what we need for a number 13 and Lucio [Cinti] is a substitute to finish the game."
Eduardo Bello replaces Francisco Gómez Kodela at tighthead prop and Guido Petti comes into the second row as the injured Tomás Lavanini misses out on the matchday 23 for Friday's Pool D clash in Saint Etienne.
Gómez Kodela is on the bench where prop Mayco Vivas was preferred to Joel Sclavi, but Cheika returned to a conventional forwards-backs split of five-three after picking six forwards on his bench against England.
Veteran fly-half Nicolás Sánchez and scrum-half Tomás Cubelli are on the bench but half-back Lautaro Bazan Vélez misses out.
"With Agustín Creevy, Nicolás Sánchez and Tomás Cubelli we have a lot of experience as finishers," said Cheika.
"It will be a different type of game this week and we return to the combination of five [forwards] and three [backs] on the bench as we usually have."
1- Thomas Gallo, 2- Julián Montoya (captain), 3- Eduardo Bello, 4- Guido Petti; 5- Matías Alemanno, 6- Pablo Matera, 7- Marcos Kremer, 8- Juan Martín González; 9- Gonzalo Bertranou, 10- Santiago Carreras; 11- Mateo Carreras, 12- Santiago Chocobares, 13- Matías Moroni, 14- Emiliano Boffelli; 15- Juan Cruz Mallía.
Replacements: 16- Agustín Creevy, 17- Mayco Vivas, 18- Francisco Gómez Kodela, 19- Pedro Rubiolo, 20- Rodrigo Bruni, 21- Tomás Cubelli, 22- Nicolás Sánchez, 23- Lucio Cinti.
Coach: Michael Cheika (AUS)