I missed a signing as it seems. Jamie Gittens already signed for Chelsea. 
64 million euros is a good profit for Dortmund. But they have lost an important member of the squad on one hand...
Duranville wouldn't be enough by himself as LW. They had better fill Gittens' space this summer.
So far no name has been linked to Dortmund as Gittens's replacement. They have still Duranville, which is good enough, but only lack of minutes. I think he can develop even further if his club gives him enough minutes. He still has a lot of upside. Nevertheless, adding a new winger is a must to increase the depth in their LW position. 64 million euros is a good profit for Dortmund. But they have lost an important member of the squad on one hand...Duranville wouldn't be enough by himself as LW. They had better fill Gittens' space this summer.