Borussia Dortmund chief Michael Zorc is wary of talking up the prospect of signing Chelsea winger Kevin de Bruyne.

Zorc has confirmed their interest in the Belgium international.

But he remarked yesterday: "He has a long-term contract with Chelsea (until mid-2017) that we should respect. Even so, we continue to monitor his situation.

"We do not dive into top salaries for our top players, as is usual with clubs like Manchester City, Chelsea, Real or Bayern. It's why players like Cavani and Falcao are not candidates with us."