The situation has not been helped by Mourinho's negative comments about Pogba's success with France at the World Cup, made on several occasions during United's recent tour of the USA, that went down very badly with the player.
Things have not come easy for Paul Pogba at Manchester United, and it appears to be taking its toll.
Pogba made 37 appearances in all competitions for Manchester United last season.
"By building the team around him, Jose would be challenging Pogba to prove he is an elite player by delivering captain's performances every week".
Reports that Raiola had spoken with Barcelona and was set for talks with United over Pogba's future began to circulate in Spain and Italy on Monday.
If the 55-year-old does not last at the 20-time Premier League champions this campaign, perhaps he would consider taking on an worldwide job, something he has not done before.
Mourinho was in Russian Federation on punditry duty and offered little in the way of praise for Pogba, while during a pre-season interview with beIN Sports he suggested the midfielder "started average".
"I don't think it's about us getting the best out of him", Mourinho told ESPN FC.
'For one month the players are in a closed camp, ' Mourinho explained.
The Red Devils, therefore, have limited time to acquire a replacement for Pogba and makes any deal before the transfer window in Spain closes on 31 August a near-impossibility.
Barcelona want Pogba to complete their midfield.
With Mourinho known for not staying at a club for longer than three seasons, fans seem to be wary ahead of his third campaign at United.