He became very injury prone here and another problem is that Juventus coaches are always trying to use players like Bentancur, Pjanic, Hernanes, Rabiot and Arthur as registas and it's a fucking dumb idea.
See this bullshit? Arthur was playing as LCM for Barcelona, Rabiot was playing as LCM for PSG, Pjanic was playing as RCM for Roma, then they went to Juventus and guess what? They were turned into registas and also Rabiot was often used as LM by Allegri lmao. What was the point to waste Pjanic as regista when his natural position is mezzala? nobody knows, ask Allegri, then sarri had no other options but to play him there too, then Pirlo came and it was Rabiot/Bentancur/Arthur time to play there lol.