Members of Rayo's Bukaneros and Barcelona's Boixos Nois clashed before Saturday's La Liga match.
Angry Zeljeznicar fans stormed the pitch following a 1-0 home defeat to Zvijezda 09 on Sunday.
Hertha Berlin ultras clashed with riot police at the Westfalenstadion during Saturday's Bundesliga match with Borussia Dortmund.
Slavia Prague fans clashed with stewards inside the Parken Stadium after the side's Europa League match against FC Copenhagen on Thursday night.
A Polish Cup match between Wisla Sandomierz and Korona Kielce was halted on Wednesday after a pitch invasion.
Santiago Wanderers fans fought amongst each other in the stands at the Estadio Elias Figueroa Brander during Sunday's match with Cobresal.
Rapid Vienna hooligans invaded the pitch at the Allianz Stadium following their team’s 1-0 defeat to Austria Vienna on Sunday.
Alianza Lima fans clashed with church members on Monday in a dispute over who owns a plaza in front of the Estadio Alejandro Villanueva.
Universitatea Craiova and Dinamo București fans clashed in the stands prior to kick-off in their Liga 1 match on Saturday.
A group of Ajax fans were attacked by Dynamo Kyiv hooligans as they relaxed at a Kyiv pub before a Champions League play-off tie on Tuesday.
Santos' Copa Libertadores match with Independiente on Tuesday night was abandoned after the Brazilian club's fans wreaked havoc.
A brawl broke out between rival fans before a Polish lower-division match on Sunday.