During his time at Milan, Fuser also spent time on loan at Fiorentina during the 1990–91 season, before completing a move to Lazio in 1992. This turned out to be arguably his most successful time in football becoming a fan favourite while playing 188 games in six years, scoring 35 goals and winning the Coppa Italia and reaching the UEFA Cup Final in 1998, as the club's captain. After moving to Parma in 1998 he won the UEFA Cup, the Coppa Italia and the Italian Super Cup in 1999. He wore the number 14 shirt and captained the team in their 3–0 1999 UEFA Cup Final victory over Olympique Marseille on 6 May.