Wolverhampton Wanderers fans were attacked by a group of Standard Liege hooligans in the Portuguese city of Porto on Tuesday night.
Flamengo fans celebrating their side’s triumph in the Copa Libertadores clashed with riot police on the streets of Rio de Janeiro on Sunday.
Wydad fans couldn’t contain their anger after their side were knocked out of the Arab Club Champions Cup by city rivals Raja on Saturday.
Fighting broke out between rival fans in the stands following a Brazilian top-flight match between Cruzeiro and Atletico Mineiro on Sunday.
Celtic fans were attacked outside a pub in Rome ahead of their side’s Europa League meeting against Lazio on Thursday night.
Karpaty Lviv and St. Etienne hools clashed in a mass brawl in the western Ukrainian city of Lviv on Wednesday night ahead of the French side’s match against Oleksandriya in the Europa League.
Valerenga fans pinched a flag from the Brann section before kick-off in their Eliteserien clash on Sunday.