 Complete the following phrase:  Following his retirement in 1997, Tassotti took up a coaching position in Milans youth system, winning the Torneo di Viareggio with the AC Milan Primavera side in 1999 and 2001. In 2001, following the sacking of manager Alberto Zaccheroni, he served as a caretaker manager for the senior club and coached Milan for the remainder of the 