The defender is refusing to commit his future to the club, but hopes Robert Lewandowski will remain at Signal Iduna Park
Mats Hummels has refused to rule out leaving Borussia Dortmund this summer and says he has "never promised to fulfil his contract".
Hopefully he goes to Barca this summer :)
brilliant signing for barcelona, hummels is a world class player.
he would be better staying in Germany.
I don't understand why these players want to leave such a great club.