 Complete the following phrase:  Stroppa started his playing career in AC Milans youth system, and was loaned for two seasons at Monza, a de facto Milan feeder club at the time. He returned to Milan in 1989, making his professional senior debut for the club in the Coppa Italia on 23 August, in a 00 away draw against Parma; Milan later reached the Coppa Italia final, only to be defeated by Juventus. He made his 