After a stunning season playing in Serie A, the central defender was able to find himself in the German provisional squad for the World Cup and afterwards was awarded a position in the 23 after Marco Reus suffered an injury.
The 22 year-old's performances has not gone unnoticed with many German sides and even Italian giants Juventus are interested in the player according to the Gazzetta Dello Sport.
It is believed that Juventus's interest has even prompted a bid to be made for the player in the region of around 6 million euros.
The former Everton player made 33 appearances in the League last season for Sampdoria with one goal as well to show.