Ralf Rangnick has sent a warning to the Manchester United fans that booed Paul Pogba against Norwich City,
There was a poisonous atmosphere leading up to the Red Devils' 3-2 win over Dean Smith's men as a section of supporters staged a protest against the Glazer family outside Old Trafford.
And that toxicity spilled over into the stadium as they took aim at Pogba when he was replaced by Marcus Rashford with 15 minutes left. Supporters jeered the Frenchman with his future hanging in the balance.