Brawls with opposition fans, fireworks, and stadium break-ins: AZ Alkmaar fans have built up something of a reputation for themselves in recent years.
Last night's chaos saw horrifying scenes where violent Alkmaar fans, wearing hoods and clad all in black, tried to force their way into West Ham's hospitality area following the Europa Conference League semi-final clash in the Dutch city.
Two heroic West Ham fans were able to stand their ground as the thugs tied to force their way beyond the stairwells leading up to the stands. Fending off a group of Alkmaar supporters, matching them blow-for-blow, they were able to deter the mob from reaching the Hammer's players' loved ones.