The Dane was given the award on Friday.
Ten Hag said: It's fantastic. Yeah, he had a difficult first half of the season in the Premier League, but scored many goals in the Champions League.
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"He was disappointed that it took a long time before he could get his first (league) goal. And after his first goal he made many and he was in a very good flow. So he has to pick that up once he's returning and I'm sure he will do.
"But this prize will help him; it will be supportive of this and will push him even more."