Blues manager Enzo Maresca made the declaration last week and the Dane says he learned of the decision via a friend.
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"I got it sent from a friend on WhatsApp," he told Viaplay. "I don't think much about it, I'm just trying to do my best to play this weekend."
He also said, "When I switched here, I knew I shouldn't start playing in the Premier League. It was fair to me, I understood it. Rob (Robert Sanchez) had been here longer than me.
"I've been happy about my four matches so far. I hope there will be many more."