#5 He is young but experienced
The 21-year-old is massively experienced. The youngster spent two years on loan in the German top-flight, where he was a regular starter against some of the best teams and players in world football.
Furthermore, the Dane now has experience of Premier League football as well as the UEFA Champions League, where he has already faced European giants such as Atletico Madrid.
The defender has also established himself in the first team for Denmark and played in six of their matches during their successful World Cup qualifying campaign.
If he continues developing at this rate, playing alongside experienced defenders and under brilliant coaches, then there is no doubt that one day he will become the best defender in the world.