Tottenham and Arsenal fans clashed ahead of the north London derby.
PAOK's Greek Cup semi-final against Olympiacos was abandoned on Wednesday as home fans clashed with riot police on the Toumba Stadium pitch.
Marseille fans wreak havoc on the streets of Bilbao.
Diagoras fans invaded the pitch and attacked Ialysos fans.
Swedish police arrested about 100 Brøndby fans in Malmö.
On Sunday, about 100 people attacked a Corsican police station with Molotov cocktails in response to arrests following Bastia's match at Reims.
A Southend United fan attacked rival Colchester supporters during Saturday’s Essex derby at Roots Hall.
Clashes between Atromitos and AEK fans after the end of the game.
Cartagines and Herediano fans clashed in the stands during their Primera Division match on Thursday.
A large group of Spartak Moscow and CSKA Moscow hooligans clashed in a mass brawl on the streets of the Russian capital yesterday.
São Paulo fans clashed with police during a football match in Mogi das Cruzes, Brazil, on Sunday.
Football hooligans from two rival Swedish teams clashed in a mass street brawl in one of Stockholm's streets on Saturday.