Should United eventually accept an offer, Pogba would earn €100m (£100m) over five years at the Nou Camp.
Pogba played virtually every minute of France's triumphant World Cup campaign, whereas Young and Fellaini both went to the semi-finals with England and Belgium respectively.
United, though, have reportedly rejected the insane swap deal and have no intention of selling the recently crowned World Cup victor.
Mourinho warned that United could face a "difficult season" if no further players are bought to the club this summer. United fans certainly expected more from the Frenchman when he returned to Old Trafford from Juventus in the summer of 2016.
Rio Ferdinand has issued a public call to Manchester United executive vice-chairman Ed Woodward about the club's business this summer.
Speaking after a dour performance at the Allianz Arena, Mourinho confirmed the trio would return to training on Monday for the first time since the World Cup.
That is the verdict of Sky Sports pundit Jamie Redknapp.
Trump aims tweet at LeBron James, questions his intelligence
But the best laugh was reserved for the man who conducted the LeBron interview, suffering the worst of Trump's Twitter jab. These past few days, Bron Bron has geeked out over opening up his Akron I Promise school .
"And I think that's now what could possible happen in this situation as well". He's got a nice left foot - touch, touch, touch - and it's not easy if you're a midfield player because you want it quick.
"He wants to be that man".
N'Golo Kante doesn't mess about - he gets it and gives it.
"We're living in an age where, when the star man has a problem with the manager, it's now the manager who goes first".
Skip to 1:20 in the video to hear Redknapp's comments.
While Matic is a top central midfielder, it's true that he likes more time on the ball than Kante, who wins possession and lays it off immediately. #MUFC is Pogba's home, ' former United centre-back Ferdinand tweeted.
Whisper it quietly but Redknapp might have a point.