As 2017 draws to a close, it's time to take a look back at some of the craziest and most interesting moments of the year.
Saint-Etienne hooligans clashed with riot police after their side's defeat 4-0 at home to Monaco on Friday.
Two groups of Partizan fans clashed in the stands during their derby clash against Crvena Zvezda on Wednesday night.
AEL Limassol and APOEL fans invaded the running track at the Tsirion Stadium and attacked each other during a match on Monday night.
Adelaide United and Sydney FC fans clashed on the street ahead of Friday's A-League game between the two teams at Hindmarsh Stadium.