Go Ahead Eagles fans attacked De Graafschap players after a 4-0 home defeat in the Dutch second division on Sunday.
Saturday's derby between Piast Gliwice and Gornik Zabrze was abandoned because of fan trouble.
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.