Coach Michael Cheika has kept faith with the rest of the starting team and bench that defeated Wales 29-17 in their quarter-final clash in Marseille, including another start for Santiago Carreras at flyhalf.
The side will be captained by hooker Julian Montoya having won their last four games in a row since an opening defeat by England, a feat they have not achieved since the 2015 World Cup.
He makes up a front row that also includes props Thomas Gallo, who has beaten more defenders than any other forward in this year's tournament, and Francisco Gomez Kodela.
