According to Sky reporter Patrick Berger, Dortmund manager Niko Kovac has reservations about Sancho’s attitude and past discipline problems and his commitment, which could hinder the winger's return to Signal Iduna Park. The 25-year-old has already had two spells at Dortmund, the first of which made him a fan favourite and a highly sought after talent. Dortmund's sporting director, Sebastian Kehl, is reportedly "a big fan" of the player, but it could all come down to what the head coach wants.