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It is not like Pogba willingly doesn't want to give his best in Manchester United. It is just how things are. No one can give his best under the present Manchester United. If you were Pogba and by this time you don't know your permanent wing in the pitch will you be happy? Manchester United's problem more from the players.
You are absolutely right that Man United's problems are too many and may not be solved next season. So it's a good move if Pogba finally decides
to leave. Because Pogba feels he will find it difficult to develop if he extends his contract at Man United. After all, Pogba, like other star players,
wants to play in the Champions League. If we look at the current situation, it seems very unlikely that Man United will be in the top 4 this season.
So if Pogba decides to stay he may not play in the Champions League next season, therefore I quite understand why Pogba wants to leave Man United.
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I don't think about how much price pay by Manchester United to get Pogba from Juventus but he not get good tandem on Manchester United like on Juventus, his position when arriving on Manchester United as holding midfielder different when have impressive performance with Juventus where Paul Pogba as attacking midfielder and always have contribution on created assist or scoring goals. When arriving on Manchester United Pogba always play as defensive midfielder and less contributing how to give assist and creating goal, I think next season he will try new challenge with other club.
When it comes to Pogba's playing position at Juventus, it's different from when Pogba played at Man United. You are absolutely right Pogba at
Juventus plays more as an attacking midfielder, and it is proven that Pogba's performance is better if given the opportunity to help attack.
Meanwhile at Man United, Pogba mostly plays as a defensive midfielder and it seems that Pogba is difficult to play well in that position.
Therefore, while playing for Man United, Pogba had difficulty playing consistently, and Pogba's performance was not as good as when he played
for Juventus. Sometimes good players, if placed in an inappropriate playing position, will play badly. So the coach's job should be to know where
to put his players.