He told BILD: "I'm working hard to get back on the field, I want to help my team. I just think about the return, but I'm sure that soon I will return to play at a high level with both Borussia Dortmund and with the national team in the World Cup.
"I am 100% focused on Borussia Dortmund everything else does not matter. I hear many rumours about my future, but I've always said that the priority goes to my current team."
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