[2][3] Fusi began his career with Como, then playing for Sampdoria from 1986 to 1988, and also winning a Coppa Italia with the Genoan side.
Having won another Coppa Italia title in 1993, also reaching the 1992 UEFA Cup final, he moved to crosstown rivals Juventus, where he won another Serie A title and a personal third Coppa Italia in 1995, although he began to be deployed less frequently when Lippi switched to a zonal marking defensive system, which did not feature a sweeper, and collected only 10 appearances in the league in total, and 18 in all competitions throughout the season.
[2][3] Fusi made his Italy national team debut on 31 March 1988 in Split, against Yugoslavia, as a substitute for Luigi De Agostini.
In June 2008, he signed for Real Marcianise of Lega Pro Prima Divisione (third tier), guiding them to a mid-table finish.
He was removed from his managerial duties on 27 April 2010 due to poor results, with Foligno in 15th place, and replaced by Salvatore Matrecano.