 Complete the following phrase:  Costacurta began his final professional season with the club at age 40. During the season, he won his fifth UEFA Champions League title with Milan. On 7 May 2007, at age 41, he announced his retirement, effective at the end of the 200607 season. He remained with the club as a second assistant to manager Carlo Ancelotti for a short time afterwards. He made his final home start in Milans 32 loss to Udinese on 19 May 2007, converting a penalty that marked his first Serie A goal since the 