He was very popular at this time, and Bernard Sauvat wrote a song dedicated to him. Piazza earned 15 caps for Argentina, but could not participate to 1978 FIFA World Cup in his country due to family problems even though César Luis Menotti wanted him in the squad.
At this period, he was immensely popular; Bernard Sauvat penned a song for him. Piazza secured fifteen Argentina caps but missed the 1978 FIFA World Cup in his homeland because of familial troubles, even though César Luis Menotti wished to include him on the squad.