The 19-year-old defender has impressed while on loan at Bundesliga side Borussia Monchengladbach.
Barcelona scouts have reportedly watched the Denmark international in action several times this season.
Mundo Deportivo reports that Barcelona could make a bid for the young defender in the summer.
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The start of the 2017-18 Premier League season is just around the corner and is shaping up to be one of the most competitive yet.
As always it is the so called “big clubs” that have splashed the most cash in the transfer window so far this summer. Manchester United or City? Arsenal or Tottenham? Who are the winners and losers of the transfer window so far?