Fuser blotted his Lazio copybook by joining A.S. Roma in the summer of 2001, where he only played 15 games in two seasons, winning the 2001 Supercoppa Italiana, and managing second-place finishes in Serie A in 2002, and in the Coppa Italia in 2003. During the 2003–04 season he played for his original club Torino, in Serie B.