"There is nothing new to comment on, those talks and negotiations are actually on-going. If we had anything to announce, we would reveal it," the 22-year-old told Ruhr Nachrichten.
"I am not going to make statements on the contents of those talks. Everyone has to be patient about it, just like I have to be patient in terms of my current injury."
For the big stories and the banter follow us on Twitter: @tribalfootball