Benfica's Enzo Perez has been called up to replace injured Newell's Old Boys winger Maxi RodrÃguez in Wednesday's friendly against Germany.
Maxi, formerly of Liverpool, is suffering from a left knee injury and is undergoing tests to establish the seriousness of the problem.
The Germany-Argentina friendly on August 15 in Frankfurt will act as a warm-up for qualifiers for the 2014 World Cup in Brazil.
Goalkeepers: Sergio Romero (Sampdoria/ITA), Mariano Andujar (Catania/ITA)
Defenders: Federico Fernandez, Hugo Campagnaro (both Napoli/ITA), Pablo Zabaleta (Manchester City/ENG), Fabricio Coloccini (Newcastle United/ENG), Ezequiel Garay (Benfica/POR), Marcos Rojo (Sporting Lisbon/POR), Clemente Rodriguez (Boca Juniors)
Midfielders: Javier Mascherano (Barcelona/ESP), Angel Di Maria (Real Madrid/ESP), Fernando Gago (Valencia/ESP), Jose Sosa (Metalist Kharkiv/UKR), Pablo Guinazu (Internacional/BRA), Rodrigo Brana (Estudiantes), Enzo Perez (Benfica/POR)
Strikers: Lionel Messi (Barcelona/ESP), Gonzalo Higuain (Real Madrid/ESP), Ezequiel Lavezzi (Paris Saint-Germain/FRA), Sergio Aguero (Manchester City/ENG), Eduardo Salvio (Benfica/POR)