Hajduk Split fans clashed with police in the stands during their Croatian Cup final against Dinamo Zagreb in the eastern city of Vinkovci on Wednesday.
Legia’s away game against Lech Poznan was abandoned on Sunday after Lech hooligans threw smoke bombs and invaded the pitch.
A fight broke out between rival fans in the stands of the Tele2 Arena after Hammarby’s 1-0 defeat to AIK on Sunday.
Marseille fans clashed with riot cops in the Old Port area of the southern French city after their team’s defeat to Atletico Madrid in the Europa League final on Wednesday night.
A mob of Sporting hooligans attacked players and staff members at the club’s training complex on Tuesday.
Lausanne-Sport hooligans attacked rival Thun fans during their Swiss Super League match on Sunday, causing the game to be abandoned.
Hamburg fans delayed the end of their Bundesliga match against Gladbach on Saturday after learning their side will be relegated to the second tier.
A Dinamo Bucharest fan pinched a Hungarian flag from Sepsi supporters during their Liga 1 clash on Monday.