 Complete the following phrase:  Born in Monza, Italy, Antonioli developed as a player in the youth ranks of A.C. Milan. He was later loaned out to Monza, making his professional debut with the club in 1986, at the age of 16, in a 10 defeat to Juventus in the Coppa Italia. He also made his Milan debut in the Coppa Italia, in a 21 home win over Lazio, on 3 September 1988, and made his Serie A debt with the club on 18 April 1992, in a 10 win over cross-city rivals Inter. Due to some promising performances, he was brought to the Milan starting lineup at the beginning of the 