But ahead of tomorrow night's clash with Newcastle, Ten Hag said: "It was a purchase for the present and the future when we decided to buy him.
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"He has to develop, he has to improve, but he needs time - and sometimes it goes up and down. He struggled for his first Premier League goal, but he showed strong character.
"I am calm, he is close."
The Dane has 14 goals in 40 games this season at United.