The Red Devils will now take on Middlesbrough at home after a hard hard-fought 1-0 win over Aston Villa at Old Trafford in round three.
Scott McTominay's headed goal from Fred’s pinpoint cross in just the eighth minute proved to be decisive as Ralf Rangnick's side won the battle for supremacy.
Ralf Rangnick has suggested that Scott McTominay has the leadership qualities to be a future Manchester United captain.
The German's tip came after the 25-year-old led the Reds' progression into the fourth round of the Emirates FA Cup with a match-winning header against Aston Villa.