Chiellini is new to the U21s, having played just 5 games, scoring 1 goal against Portugal in March.
In all, he has made 49 appearances for Italy from U15 to U21, scoring 5 goals.
This past season for Livorno, he played 41 games, scoring 4 goals. He played one Coppa Italia game. It was his first full season for Livorno, having played just 14 games total over the previous 3 seasons, all for Livorno in C1 and B.