On this day in 2001, Paris St-Germain and Galatasaray fans clashed in the stands of the Parc des Princes during their Champions League match.
Atlas and Chivas fans clashed in the stands of the Jalisco Stadium following their Liga MX match on Sunday.
Sedan and Utrecht fans were involved in a mass fight with Bastia supporters before a French fourth-tier match on Saturday.
Fans of Russia's Fakel Voronezh and Ural Yekaterinburg were attacked in the stands during their FNL Cup tie in Cyprus.
Universidad de Chile fans caused trouble during their Copa Libertadores match against Brazilian side Internacional at Chile's National Stadium in Santiago on Tuesday.
Universidad Catolica fans clashed with riot cops at the San Carlos de Apoquindo stadium before the start of their Primera Division match with O'Higgins on Sunday.
Coquimbo Unido fans staged a protest on the pitch during the side's Primera Division match against Audax Italiano on Friday.
Trouble broke out in the stands of Athens' Nea Smyrni Stadium following a Greek Super League match between Panionios and Atromitos on Sunday.
Aarau and Servette fans fought at Neuchatel railway station on Saturday night.
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.