Actually throughout history Juventus had:
- 2 players from Holland: Davids and Van Der Sar
- 15 players from Argentina: Camoranesi Mauro German Serra, Castellucci Eugenio , Cesarini Renato, Conti Raul, Della Valle Edmondo, Esnaider Juan Eduardo Belen, Maglio Josè, Martino Rinaldo Fioravante, Monti Luis, Orsi Raimundo Bibiani, Ricagni Eduardo, Rosa Humberto Jorge, Sivori Omar Enrique, Sorin Juan Pablo, Vairo Juan
- 13 players from Brasil: Altafini Josè João, Athirson Mazzolli e Oliveir, Cinesinho Sidney Cunha, Colella Leonardo, Da Costa Dino, Emerson Ferreira Da Rosa, Fernando Josè Puglia, Gladstone Pereira della Vale, Julio Cesar Da Silva, Miranda Armando, Nenè Claudio Olinto de, Sernagiotto Pedro, Siciliano Bruno
So your claim of 3 to 4 players from both Argentina and Brasil is pretty much wrong.