Borussia Dortmund general manager Hans-Joachim Watzke has admitted that Robert Lewandowski is frustrated after being denied a move to Bayern Munich this summer.

Lewandowski spoke out in the past week, claiming that the club had lied to and cheated him out of a move to Pep Guardiola's side.

"He was obviously referring to me," Watzke told WAZ. "I can fully accept that Robert is a bit frustrateD, but I have got to make decisions for the good of this club."

Lewandowski will stay at the club this season, but it is believed that he will move to Bayern on a free transfer next summer.