Tottenham Hotspur and England international star Eric Dier has stormed off the pitch and into the stands to confront a fan.
Photos and videos uploaded to social media show the player yelling 'he's my brother' to a person in the stadium's west stand lower.
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It's not known what sparked the altercation, however it happened just as Jose Mourinho's team crashed out of the FA Cup on penalties against Norwich City.
Spurs boss Mourinho later suggested that the incident was to do with his 'young brother'.
However, the 'Special One' condemned his player's response to the incident and said that what "he did was wrong."
Mourinho explained in a press conference: "I don't think that belongs to the game.
"The game was a fantastic representation of the FA Cup, but I cannot run away from the question.
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"I think Eric Dier did what we as professionals cannot do, but when someone insults you and your family is involved, especially your young brother.
"This person insulted Eric, the younger brother was not happy with the situation and Eric was not happy. We as professionals cannot do what he did.
"If the club discipline Eric Dier, I would not agree with it, but what he did was wrong.
Mourinho added that the altercation occurred in a corporate section where he says houses fake Spurs fans.
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"The people that are in these privileged positions by the tunnel, of course some are Tottenham fans," he said.
"But I think a lot of corporate, a lot of invitation, a lot of people with special status [are in there] and probably it is the place of the stadium where I sometimes have doubts over if they are the real Tottenham fans, because these [real fans] are the ones who support the boys until the last."
Tottenham have yet to release an official statement regarding the incident.
Featured Image Credit: queercatholic1/TwitterTopics: News
