He has been linked with moves to Barcelona and Juventus after sources told ESPN FC the 25-year-old was unhappy at some of Mourinho's criticism of him during the summer.
Although Mourinho struggles with Pogba's celebrity status and flashy exterior, senior club figures see him as the essential stellar star to lead United's quest to be champions again after a five year wait for the League title.
United fans purred at the presence of Pereira, Fred and Paul Pogba playing together in midfield and Andreas reserved some kind words for our World Cup victor, who played over an hour after less than a week of training. If you have round pegs in round holes, and all of them are doing the right job at the same time, then you are going to do well.
"I won't be full from a World Cup. But if you're not happy, you can not give your best".
The crowd went wild as players surrounded the World Cup victor, but one fan, who was named after the great George Best was celebrating more than most.
Pogba posted a message on Instagram after the game that notably did not include a reference to his club boss.
Asked if he was happy and comfortable, Pogba replied: 'There are things I can not say, otherwise I will get fined'.
"[United] is a different team, obviously".
"I am someone who is not (in) a role that I give to myself".
"We thought maximum 60 minutes but he managed (more than) 80".
"I had only two options, Scott [McTominay] or Paul, but if I play Scott I play two two kids and a new player, so I asked Paul and he put himself available for the team and he was very, very good for us".
It's Shaw's victor. He scored his first senior team goal with a lovely move around his defender and a fine finish to the far post. And wearing this, it's even more because of the past, because of the players that played here, the people that have been wearing this.