Arca was the captain of the Argentina Youth Team which featured players like Javier Saviola, Nicolás Burdisso and Maxi Rodríguez in the same squad. He won his only U21 cap in a 1–0 friendly defeat to England on 22 February 2000. During his playing time at Argentina Youth Team, Arca said he learned under José Pékerman, who at the time was in charge of Argentina's youth sides.
