Borussia Dortmund is involved in the race for Niklas Süle. It's a possible and a serious option for the defender. Talks between Dortmund and Süle's representatives have already taken place. BVB were already interested in Süle in 2016 when he was in Hoffenheim.
Süle is expected to make a decision on his future soon. At the moment, he's rather leaning towards a move abroad. Both Dortmund and Süle's camp didn't want to comment on the rumour.