A man punched a Tottenham fan for singing "we f***ing hate Millwall" following The Lions 6-0 defeat in the FA Cup quarter final.

The seven second video clip shows two Tottenham fans singing "we f***ing hate Millwall", before a man walking past hits one of them in the face.

The Metropolitan Police confirmed they are aware of the video, but said the victim did not approach police for help, and declined treatment from the London Ambulance Service.

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A spokeswoman for the Metropolitan Police said: "The Met is aware of the video circulating on social media, and the video has also been reported to police.

"No victim made themselves known to officers policing the football match, and police are aware a man, believed to be the one in the video, declined assistance from London Ambulance Service.

"At this time there has been no substantiated allegation has been made to police, should the victim do so it would be dealt with as appropriate."

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The Football Association is to investigate allegations Millwall supporters directed racist chants at Tottenham forward Son Heung-min during Sunday's FA Cup quarter-final.

Millwall fans were heard chanting "DVD" and "You're selling three for a fiver" at Son, thought to be in reference to the racist stereotype of traders selling bootleg copies of films.