Boca Juniors striker Pablo Mouche scored twice for the Argentine team, most of whom were winning their first cap at the 25,000-capacity stadium which will host three matches in the Copa America in July.
Coach Sergio Batista's first choice Argentina team with a vast majority of European-based players have friendlies away to the United States and Costa Rica later this month.
Argentina host the Copa America from July 1 to 24.
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