Morfeo was never capped by the Italy national football team at senior level, although in February 1996, he was called up by Arrigo Sacchi along with several other young, promising Italian players to an Italy training camp. Between 1991 and 1992, Morfeo represented the Italy Under-15 and Under-16 side, collecting 7 appearances and scoring two goals for the team. In 1993, he was called up to the Italy Under-18 side, with which he scored six goals in as many appearances. At Under-21 level, he was first called up under Cesare Maldini in 1995, and he was later one of the key players in Italy's victorious 1996 UEFA European Under-21 Championship campaign, scoring the decisive penalty in the final shoot-out victory against Spain, after coming on as a substitute for Francesco Totti in the second half; that same year, he represented the youth side at the 1996 Olympics. In total, he managed 7 appearances with the under-21 side between 1995 and 1997, scoring 1 goal for the "Azzurrini".