Borussia Dortmund sporting director Sebastian Kehl has praised central defender Niklas Süle over his fitness and acknowledged one of the club’s strikers may have to leave. Süle was dropped at the back end of last season and was not chosen for Germany’s Euro 2024 squad after concerns over his weight. But he returned to pre-season training looking slimmed down after VfB Stuttgart’s Waldemar Anton was signed to replace Mats Hummels and provide extra competition alongside Nico Schlotterbeck. “It was a statement from Niklas to return in this manner,” Kehl told reporters on Sunday on the team’s pre-…