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Mats Hummels admits he is struggling to make a decision about his future as he continues to be linked with a move away from Borussia Dortmund.
Hummels has spent seven years at Borussia Dortmund but he is expected in high demand in the summer with Bayern Munich, Barcelona, Manchester United and Liverpool have reported to be interested in signing the defender.
His father and agent Hermann Hummels has previously said that his son faces a difficult decision regarding his future and the Germany international admits the speculation has cost him sleep.
"It's a very difficult decision, and when I finally make it people will understand how hard it is for me," Hummels told Sky Germany.
""I've set a date, but I'm keeping it to myself. It's been taking me at least half an hour extra to fall asleep for several weeks now because this is such a big issue for me."