The first I hear of it. I know Juve is interested in Milik, but Kapustka? He would probably be better off gaining experience in a slightly smaller club than sitting on the bench in a giant like Juventus or Dortmund, so Leicester and Southampton seem to be better choices.
There's another player...
Kapustka is one of the, if not THE, greatest talents in Polish football recently, so if I had to choose one, it would be him.
Also, the Legia trio, Pazdan, Jędrzejczyk and Jodłowiec, are all class players, but I doubt Legia will want to sell them before their Champions League qualifiers (it...
Jędrzejczyk plays for Legia Warsaw together with Pazdan (the bald guy) and Jodłowiec. Mączyński, Kapustka and Peszko play in the Ekstraklasa too, so all six of them are well within Albion's reach.