Harry Kane: Mauricio Pochettino says FA Cup tweet 'embarrassing'
Tottenham boss Mauricio Pochettino says a tweet sent from the FA Cup account mocking Harry Kane was "embarrassing".
The message asked United and England defender Chris Smalling "What's in your pocket?" and included a short clip of him replying: "Harry Kane."
The Football Association apologised, and Pochettino said: "We need to protect our English players."
The Argentine, who was appointed Spurs boss in 2014, added: "We need to give them belief. We need to teach them, to educate, and this type of situation disappointed me a lot.
"For me, it was embarrassing. It was a shame because the FA is English football... and a potential captain like Harry Kane in the World Cup... I think was difficult to understand, very, very difficult."
Kane has scored 37 goals in 44 games in all competitions for Spurs this season.
He struggled to make an impact against United at Wembley but denied returning too soon from a recent ankle injury.
The 24-year-old, winner of the Premier League's Golden Boot for the past two seasons, has been ridiculed in recent weeks after claiming a goal in the victory at Stoke.
The Premier League duly confirmed the ball had touched Kane on its way into the net and he was awarded the goal.
Analysis: Weird, wrong and embarrassing by the FA
Former Tottenham and England midfielder Jermaine Jenas, speaking on 5 live's Football Social
Mauricio is right, it is a joke. It's embarrassing that the governing body of football in England feel they can go down that particular road about one of their own players.
It was weird. It didn't sit comfortably with me at all that the FA decided to do it. They should stay away from that all together.