 In 1996, he transferred to Flamengo, but he came to prominence playing in the Italian Serie A for unfashionable Udinese in the late-1990s.There he starred alongside Oliver Bierhoff in a side which played an adventurous 3–4–3 formation, finishing his first season with the club in third place in Serie A.When the league's top scorer Oliver Bierhoff left the club for A.C. Milan in 1998, many thought Udinese Calcio would struggle to repeat their success, but that very next season Amoroso himself became the focus of the team, and was the top scorer in Serie A with 22 goals.