Bayern Munich defender Niklas Süle will move to rivals Borussia Dortmund on a free transfer in summer, Dortmund confirmed on Monday. The Germany international will sign a four-year contract with Dortmund, the last side other than Bayern to win the Bundesliga – back in 2012. “We are delighted to sign Niklas Süle, a German international, free of charge,” Dortmund sporting director Michael Zorc said. Sebastian Kehl, head of professional football at Dortmund, said the defender showed in personal talks “that he has a great desire to play” for the club. “He has a lot of experience, calmness in the b…