From fist fights to stabbings to thousands of fans doing battle on the pitch, here's a list of the most violent fans in world football. 1.10: AS Roma. 2.9: Sparta Prague. 3.8: FC Barcelona. 4.7: Millwall. 5.6: Partizan Belgrade. 6.5: Red Star Belgrade. 7.4: Galatasaray. 8.3: Universitario de Deportes.