Raja Casablanca fans clashed with cops in the stands during Sunday's game against Kawkab Marrakech.
Athletic Bilbao and Spartak Moscow fans clashed on the streets of the Basque city ahead of their Europa League match on Thursday night.
Fan trouble broke out at the DW Stadium after Wigan Athletic's 1-0 win over Manchester City in the FA Cup on Monday evening.
Clashes broke out between Olympiacos hooligans and riot police at the Georgios Karaiskakis Stadium on Sunday after Olympiacos lost 2-1 to AEK.
A small group of Colo-Colo fans tried to pinch a banner from Antofagasta supporters at half-time of Saturday's Primera División match.
Colo-Colo and Santiago Wanderers fans clashed in the stands during their Chilean Super Cup final on Friday.
RAAL La Louvière fans attacked Francs Borains supporters following Saturday's defeat in the Belgian Third Amateur Division.
FC Köln hooligans managed to pinch a flag from Borussia M'gladbach ultras during the half-time break of Sunday's Bundesliga match.
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.