Borussia Dortmund insist striker Robert Lewandowski is not for sale. Dortmund CEO Hans-Joachim Watze is raging about the speculation linking Lewandowski with Manchester United, which all stemmed from comments made by Poland coach Franciszek Smuda.

"This discussion makes me sick," he told Der Westen . "Whether offers arrive for him or not, it's totally irrelevant. If I explicitly say for weeks that Robert will definitely compete for the championship and return from his summer vacation for training with us, that is so."