The 23-year-old has been strongly linked with a move away from Dortmund as he is yet to agree a new contract with the club.
Arsenal and Manchester United are reportedly leading the chase for the £25million-rated ace.
Watzke said: “In the case of Ilkay Gundogan, we do not yet know how it will turn out. We would love to extend (a contract) with him.”
United boss David Moyes is desperate to strengthen his midfield in January and could make a move for Gundogan as well as Atletico Madrid starlet Koke, according to the Daily Star.
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Being an amiable guy is good for you and Jurgen Klopp is living proof.
Summer 2016 is set to be a very exciting time for football fans, as this is when the long awaited Euro 2016 tournament kicks off.