In late 2008, Pato scored two goals in Milan's 5–1 win over Udinese just before the Christmas break, and managed to shine again with a brace against Roma the following matchday at the Stadio Olimpico on 11 January 2009, proving that he is a vital part of Milan's attack. He continued his impressive form for Milan, hitting six goals in four games, including a game winning strike against Fiorentina on 18 January. On 15 February, he scored his 11th goal of the season in a 2–1 defeat against home rivals Internazionale. On 26 February, Pato scored his 12th goal of the season against Werder Bremen in the UEFA Cup, a game Milan drew 2–2; but with this, were knocked out the competition on the away goals rule. Pato continued his good form with two goals against Siena on 15 March. Pato finished the 2008–09 season as Milan's top goalscorer with 18 goals.