English football, already scarred by the Wembley disorder in Milwall's FA Cup semi-final loss to Wigan, has been gripped by violence again as Newcastle fans fought running battles with mounted police.
Twenty seven fans were arrested and at least three police officers injured following Newcastle's 3-0 home defeat to bitter local rivals Sunderland.
Police say they were pelted with missiles as they clashed with Newcastle fans attempting to confront Sunderland supporters at the city's railway station.
The violence came 24 hours after 14 men were arrested when Millwall fans fought amongst themselves in the dying moments of their team's 2-0 defeat to Wigan in the FA Cup semi-finals at Wembley.
And the violence wasn't just in England, with incidents from Munich's glittering Allianz Arena to the 2004 Olympic Stadium in Athens.
In Munich, police warned of a "new dimension of violence" after 16 officers were injured and more than 60 supporters detained before champions Bayern Munich's match against Nuremburg.
According to reports, a group of 400 Nuremberg fans was attacked by 120 Bayern fans en route to the stadium before the away fans then turned on police, using stones and bottles.
Weapons, including knuckle-dusters, were used in the fighting.
Two key matches in the Greek Super League saw hundreds of supporters clash with police who resorted to tear gas and stun grenades to quell the assault.
The most serious incidents happened at the Athens Olympic Stadium where the match between the home team AEK and Panthrakikos was suspended when hundreds of angry AEK fans dashed onto the pitch after the visitors took a 1-0 lead courtesy of an own-goal in the 87th minute.
As the stadium emptied, some 300 fans remained, destroying plastic seats.
An hour-and-a-half before the start of that game, Olympiakos fans, Panathinaikos supporters and police clashed outside Karaiskaki Stadium.
Fire bombs and rocks were thrown at police who responded with the use of tear gas and stun grenades.