Around 200 Lazio hooligans clashed with riot police near the Stadio Olimpico ahead of the side's Italian cup final against Atalanta on Wednesday.
Inter and Napoli ultras clashed outside the San Siro ahead of their Seria A match on Wednesday.
Palermo fans fought among themselves in the stands during Saturday's Serie B match against Salernitana.
Varese and Como fans clashed in the stands during an Italian Serie D game on Sunday.
Brescia and Cagliari fans clashed with one another ahead of a pre-season friendly match yesterday.