Espanyol and Athletic Bilbao fans clashed in the streets ahead of their La Liga match at the RCDE Stadium on Saturday.
A fight broke out between Valencia and Barcelona hooligans before Saturday's La Liga match between the two clubs.
Rouen and Metz fans briefly clashed ahead of their French Cup match on Monday.
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Six Lazio fans were attacked by Cagliari hooligans ahead of their Serie A clash at the Sardegna Arena on Monday.
Real Zaragoza and Racing Santander fans clashed ahead of their Segunda Division match on Saturday.
PSG and Galatasaray fans clashed in the French capital ahead of the teams' Champions League meeting at the Parc des Princes on Wednesday.
Two Blackpool fans attacked a Fleetwood Town supporter on the pitch during their League One clash at Bloomfield Road on Saturday.
Wolverhampton Wanderers fans were attacked by a group of Standard Liege hooligans in the Portuguese city of Porto on Tuesday night.
Flamengo fans celebrating their side's triumph in the Copa Libertadores clashed with riot police on the streets of Rio de Janeiro on Sunday.
Wydad fans couldn't contain their anger after their side were knocked out of the Arab Club Champions Cup by city rivals Raja on Saturday.