A lot of this is probably nonsense, if a player doesn't do as the club wants its easy to marginalise Dybala and remove him from training, not even let him on the bench etc. Contracts will be sorted at the end of the season and he seems to be willing to play. He has resale value so even if he isn't allowed to play for us again, someone will pick him up but since he has featured in games it makes me think all the reports are fake apart from Dybala needing to sort out his contract.
