Without get agreement both side between Pogba and Manchester United next window transfer opening Pogba become free transfer player and all club looks easy to get his sign's, I think most favorite club for Pogba is Real Madrid or back to old his club Juventus but have new rumors with PSG want to get Pogba service. I think most competitive club to get him and lets see which one his destination club keep stay in Manchester United or looking for new club, right now Pogba still injury and he has many option for new club next years and everything is possibility for him.
If I'm not wrong now, Manchester United have already offered a contract extension to Paul Pogba. But I'm having my doubts about if he will be accepting the deal or not. Because if Paul Pogba really wanted to play for Manchester United for more years, I assume that he would already have wanted an extension by himself. Or maybe he just waited for his team to make the offer, idk. But I hope that Manchester United can extend his contract otherwise they will lose an important amount of power. And if he leaves, I also would like to see him playing at Real Madrid.