Niko Schulz is joining Borussia Dortmund from Hoffenheim, 4 year deal, fee of €25 mill. I guess that's their left back problem sorted then!
Thorgan Hazard is signing for them too this summer, to replace Pulisic, according to Kicker, not that this is news, but there had been suggestion that it may not happen till the season after when his contract was up. But they will pay up now, fee is less than €30 mill.
Good deals I think, signing both of them for less than they sold Pulisic, should make them a stronger team.