Jose Mourinho saw Spurs’ Euro hopes blunted by Blades – but it was VAR Michael Oliver who really drove him around the twist.
Sander Berge fired United into a 31st minute lead with a fine finish from Chris Basham’s pull-back.
It was the Norweigan’s first goal for the club since his record £22million switch from Genk in January.
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Spurs thought they had equalised 83 seconds later when Harry Kane slotted home.
But it was chalked off after video ref Oliver spotted Lucas Moura had handled the ball as he was bundled to the floor in the build-up – even though the Brazilian had clearly been fouled.
Sky Sports pundit Jamie Redknapp branded it “one of the worst decisions I have ever seen”.
“I get the letter of the law but we have to show some common sense. When you get fouled, you have to put your arms down. It was accidental – he’s not meant it.
““It is a horrendous decision. He has got it completely wrong – and this is ruining football, things like this. Unbelievable.”
Tottenham boss Jose Mourinho meanwhile took aim at the ‘hidden’ referee.
“The one here is not the referee, the ref is hidden,” Mourinho said postmatch. “I can’t say what I think I will be in trouble and suspended and I don’t want to be, don’t ask I will not say!”
As Tottenham players protested, a furious Mourinho was given an official warning by fourth official Peter Banks after his anger threatened to boil over.
Speaking after the game, an agitated Mourinho said: “I cannot say what I feel because I will be in trouble with the institutions and I want to protect myself and my club, so I cannot be open.”
Spurs will also feel Blades should have had a man sent off in the 40th when Son Heung-min was caught in the face by an elbow from Oliver Norwood, who had just been booked for a foul on Moura.
But ref Kavanagh, despite awarding the visitors free kick, decided not to dismiss Norwood with a second yellow.
Mourinho’s misery was compounded when Lys Mousset slotted home United’s second from Enda Stevens’ cross in the 69th minute.
Oli McBurnie then made it 3-0 with an emphatic close-range finish six minutes from time before Kane pulled one back for Spurs in stoppage time.
This article originally appeared on The Sun.