The Dane's deal with the Bees runs to the end of the season.
He told Viaplay: "I do not think that there are some football players who can just pick and choose between clubs, because there are many criteria that come into play.
"There are also many clubs that need to see one's path before that happens.
"I have different offers and options, which we are considering, and then we make a decision.
"I would love to play Champions League football again. I know how much fun it is, but it isn't essential for me."
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