Bayern Munich defender Niklas Süle is set for a free transfer to Borussia Dortmund in summer, the Frankfurter Rundschau newspaper reported on Monday. Dortmund didn’t confirm the transfer when asked by dpa. Bayern chairman Oliver Kahn had already confirmed in January that the German international would leave the club after contract negotiations broke down. On Sunday, Süle’s agent Volker Struth told the Sport1 TV that the player’s decision had “nothing to do with financial matters,” and that he was not feeling “valued enough” at Bayern. Struth also said that Süle didn’t even want to attend a con…