 Complete the following phrase:  After the departure of striker Andriy Shevchenko at the beginning of the 200607 season, Ancelotti was forced to redesign Milans line-up once again, devising a 4321 system that would later be known as his Christmas Tree formation. Milans line-up used Inzaghi as a lone striker, supported by attacking midfielders Clarence Seedorf and Kaká, in front of a three-man midfield which featured Andrea Pirlo as a creative playmaker, supported by hard-working defensive midfielders Gennaro Gattuso and Massimo Ambrosini. Milan received an eight-point deduction during the 200607 Serie A season for their role in the Calciopoli scandal, which virtually put the team out of the title race, and instead led Ancelotti to focus on winning the Champions League. On 23 May 2007, Milan avenged their defeat to Liverpool two years earlier with a 21 win at the Olympic Stadium in Athens in the 2007 Champions League final, leading to Ancelottis second Champions League trophy as Milan coach and his fourth title overall, having also won it twice as a Milan player in 