Cagliari and Pogon Szczecin hooligans clashed in the streets of the Sardinian capital after a friendly between the two sides on Friday.
England fans clashed with riot cops in Prague on Friday evening ahead of the Three Lions’ Euro 2020 qualifier against the Czech Republic.
An Ukrainian First League match between Balkany Zorya and Chornomorets Odesa was abandoned on Saturday after the Odesa side's fans clashed with stewards and police.
Fighting broke out between rival sets of Tirana and Partizani fans inside the Selman Stermasi Stadium before the start of their derby match on Sunday.
Widzew Lodz's Polish cup match against Slask Wroclaw was stopped for several minutes on Tuesday after trouble broke out in the away end.
Wednesday's Bulgarian cup match between Spartak Varna and Levski Sofia was stopped for several minutes due to trouble in the stands.
A brawl between fans of ASU Poli and Dinamo Bucharest erupted in the western Romanian city of Timisoara on Tuesday morning.
Strasbourg and Eintracht Frankfurt fans clashed at a tram stop after Thursday night's Europa League match.
AIK hooligans tried to attack rival Maribor fans during their Champions League second qualifying round second leg match on Wednesday.
A brawl erupted between Nantes and Brest fans immediately after Friday's pre-season friendly at the Mane Braz stadium in the north-western French town of Inzinzac-Lochrist.
Hajduk Split fans invaded the pitch to vent their displeasure following the side's 3-1 home defeat to Maltese club Gzira United on Thursday.
Levski Sofia and Cracovia hooligans clashed in a mass fight in Bratislava on Wednesday.