Ruben Amorim defended Rasmus Hojlund's visible frustration during Manchester United's edgy FA Cup win against Leicester City, but told the striker he needed to learn to stay calm in front of goal.

The Dane was clearly angered at a lack of service from his teammates at times, complaining at long balls aimed in his direction and then venting at Alejandro Garnacho when he failed to square the ball for a tap-in when the scores were tied in the second half.

Hojlund also had a debate with head coach Amorim during the second half, just after United had equalised, with the two having a frank exchange of views that ended with Hojlund gesturing for his boss to calm down.

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It was another frustrating night in front of goal for the Dane, whose goal drought will now stretch past the two-month mark. Hojlund has failed to score in 14 games since his double against Viktoria Plzen in the Europa League.

Amorim refused to be critical of Hojlund showing his emotions on the pitch, but is keen to reinforce the message that he has to contribute without the ball and needs to cool down if chances come his way.

"It’s a good thing, I will not say one bad word about this type of behaviour," said Amorim. "He needs to understand that sometimes he has to do a job without touching the ball, he cannot get so frustrated because in the next play maybe he will have a situation near the goal so he has to be calm.

"He’s a character, players from that kind of character from that country, they always want more, they want to score, they feel the critics. It’s a good thing but he will improve."

Hojlund did get one shot away from a low Garnacho cross, with his shot blocked and Joshua Zirkzee burying the rebound. That was Zirkzee's first goal since December 19 and Amorim admitted after the game that United aren't giving either striker the service they require at the moment.

"A striker needs a very good team to deliver very good balls and we’re not helping our strikers at the moment," he said.