Dier was about to walk down the tunnel when he appeared to see his brother arguing with a fan in the lower west stand. Footage then shows the 26-year-old running into the crowd and clambering over several seats before an altercation with the abusive supporter.
The fan in question appeared to run away with Dier held back by stewards. Both the Football Association and Tottenham Hotspur have confirmed they are investigating the incident.
Asked about it in his post-match press conference, Spurs manager Jose Mourinho said: “I think the fans were with the team until the last penalty kick that we missed.
“The people who tease in these privileged positions, in this area of the tunnel, of course, some are Tottenham fans, but sometimes I think a lot of corporation, invitation, a lot of people with some special status, and probably is the place of the stadium where I have sometimes doubt they are the real, real Tottenham fan.
“Because these ones support the boys until the final whistle. This person insulted Eric, his family was there, the young brother was not happy with the situation and then Eric, I repeat did what we professionals cannot do, but it’s something that probably you would do.
“I know the reaction of Eric was based on his brother, he didn’t like what was happening there.”
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