A brief fight broke out between Bristol City and Swansea City fans during their Championship clash at Ashton Gate on Saturday.
Millwall and Everton fans clashed in a mass brawl outside The Den ahead of their FA Cup tie on Saturday.
Nautico and Fortaleza fans clashed ahead of their Copa do Nordeste match on Tuesday night.
Village Moussa fans rioted at their Algerian Cup tie against MC Alger on Tuesday, forcing play to be called off.
Inter and Napoli ultras clashed outside the San Siro ahead of their Seria A match on Wednesday.
River Plate fans clashed with riot police in Buenos Aires as celebrations to mark their Copa Libertadores win over Boca Juniors got out of hand in the early hours of Monday.
In a short statement posted on Facebook on Sunday, Cracovia hooligans wrote that they had broken off their relations with Ajax hooligans.
Clashes broke out inside the Athens Olympic Stadium ahead of AEK's Champions League match against Ajax on Tuesday.
River Plate fans attacked the Boca Juniors team bus before the second leg of the Copa Libertadores final on Saturday, leaving several players injured.
Valenciennes and Lens fans clashed on the street ahead of their Ligue 2 match on Saturday afternoon.
Ajax fans were attacked by a mob of Benfica hooligans in the Portuguese capital after their Champion League match on Wednesday night.
Egaleo hooligans clashed with riot cops before the side’s third division match against Chalkida on Sunday.