Perhaps Robert is not a player who adapts very quickly. But I'm sure it won't take him very long, the first two games, or even one will be uncomfortable for him, but I think before the season in training he can already feel at ease, so I'm not worried about his game. He is a very talented player despite his age, it will be a very good acquisition for Barcelona
It shouldn't take long especially with Lewandowski. Btw but before going to the adaptation issue they now need to increase the price in their proposal to attract attention from Bayern's side because indeed the transfer issue is still uncertain right now why bother about adaptation issues not necessarily he will be in Barcelona too if they don't raise the price for the clause Lewandowski.