A Rapid Bucharest fan stole a flag from Rapid Suceava fans during their Romanian second division match on Sunday.
Manchester United and Liverpool fans scuffled at Old Trafford during their Europa League match on Thursday.
Guarani Antonio Franco fans fought among themselves on the terraces at the Clemente Fernandez de Oliveira Stadium during their lower league match against Sol de America on Sunday.
Fortaleza fans fought each other in the stands at half-time of their Copa do Nordeste match with Sport Recife on Thursday.
FK Sloboda Tuzla and FK Sarajevo fans fought inside the Tušanj Stadium during their cup tie on Wednesday.
Tottenham and Arsenal fans were involved in scuffles ahead of Saturday afternoon’s 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.