Cardiff - Argentina switched winger Matias Moroni to outside centre in place of the suspended Marcelo Bosch for their Rugby World Cup quarter-final against Ireland on Sunday.
Juan Martin Hernandez moves back to inside centre to make way for the return of flyhalf Nicolas Sanchez, while Martin Landajo is preferred to Tomas Cubelli at scrumhalf.
Veteran back-row forward Juan Manuel Leguizamon has not recovered from injury and was left out of the squad for the match at the Millennium Stadium.
Teams:
Ireland
15 Rob Kearney, 14 Tommy Bowe, 13 Keith Earls, 12 Robbie Henshaw, 11 Dave Kearney, 10 Johnny Sexton, 9 Conor Murray, 8 Jamie Heaslip (captain), 7 Chris Henry, 6 Jordi Murphy; 5 Iain Henderson, 4 Devin Toner, 3 Mike Ross, 2 Rory Best, 1 Cian Healy
Replacements: 16 Richardt Strauss, 17 Jack McGrath, 18 Nathan White, 19 Donnacha Ryan, 20 Rhys Ruddock, 21 Eoin Reddan, 22 Ian Madigan, 23 Luke Fitzgerald
Argentina:
15 Joaquin Tuculet, 14 Santiago Cordero, 13 Matias Moroni, 12 Juan Martin-Hernandez, 11 Juan Imhoff, 10 Nicolas Sanchez, 9 Martin Landajo; 8 Leonardo Senatore, 7 Juan Martin Fernandez Lobbe, 6 Pablo Matera, 5 Tomas Lavanini, 4 Guido Petti, 3 Ramiro Herrera, 2 Agustin Creevy (captain), 1 Marcos Ayerza
Replacements: 16 Julian Montoya, 17 Lucas Noguera, 18 Juan Pablo Orlandi, 19 Matias Alemanno, 20 Facundo Isa, 21 Tomas Cubelli, 22 Jeronimo De La Fuente, 23 Lucas Gonzalez Amorosino