Robert Lewandowski: I will definitely give everything for BVB

Robert Lewandowski will join Bayern Munich next season

Robert Lewandowski has written a letter to the fans of Borussia Dortmund assuring them that he will still give nothing less than 100% for the side, despite becoming the second Borussia Dortmund player to leave for arch-rivals Bayern Munich in less than a year when he agreed terms on Saturday