The German coach expressed interest in the striker, but believes that his wage demands could prevent a deal from being reached.
"I do not know anything of a meeting with Dzeko," he had told Sky Sports News. "But if you think about what will happen to us in the next few years, we have to think about him.
"But judging by information we have, the wages he is content with technically do not fit ours, as we will not bend. We do not throw about peanuts. Still, we will leave all doors open."
Dortmund held fellow Champions League finalists Bayern Munich to a 1-1 draw in the Bundesliga this weekend.