Martinez, 20, has netted 20 goals in 26 appearances across all competitions for Racing in 2017-18. The tally includes five in as many matches in the Copa Libertadores, South America's top club competition.
As expected, the Albiceleste squad includes FC Barcelona's five-time Ballon d'Or winner Lionel Messi, Juventus striker Gonzalo Higuain, Hebei China Fortune midfielder Javier Mascherano and Manchester United center-back Marcos Rojo.
There was also a spot for uncapped River Plate goalkeeper Franco Armani, who joined the Buenos Aires club in January from Colombia's Atletico Nacional amid reports he could seek Colombian nationality.
Goalkeepers: Sergio Romero, Nahuel Guzman, Willy Caballero, Franco Armani.
Defenders: Gabriel Mercado, Nicolas Otamendi, Federico Fazio, NicolAs Tagliafico, Marcos Rojo, Marcos Acuna, Ramiro Funes Mori, Cristian Ansaldi, Eduardo Salvio, German Pezzella.
Midfielders: Javier Mascherano, Angel Di Maria, Ever Banega, Lucas Biglia, Manuel Lanzini, Gio Lo Celso, Ricardo Centurion, Guido Pizarro, Leandro Paredes, Maximiliano Meza, Enzo Perez, Pablo Perez, Rodrigo Battaglia.
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