Ibrahimovic moved to Old Trafford in the summer from Paris Saint-Germain on a free transfer.
The Swedish striker proved his worth again yesterday by grabbing the winner in United's 2-1 win FA Cup over Blackburn.
Ander Herrera has revealed everyone at Manchester United knows how important Zlatan Ibrahimovic is
He now has 23 goals in all competitions for Manchester United this term.
And Herrera has revealed everyone at Old Trafford knows how important Ibrahimovic has become, including Jose Mourinho.
“We know how important he is for us," Herrera told MUTV.
Pogba jokes around as Man Utd duo arrive at training despite fitness doubts
Mon, February 20, 2017
Pau Pogba had some fun at the expense of photographers as the Manchester United players arrived for training on Monday morning
Ben Furst/Mercury Press
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Paul Pogba is spotted having a joke as Manchester United arrive for training
"I think our manager knows exactly when he is important and when he can be decisive for us.
"And he did it [against Blackburn].
"He scored a fantastic goal from a fantastic pass from Paul.”