The Telegraph add that Mourinho and Pogba get on, despite reports claiming otherwise.
Brown, who played for United over 350 times, does not think the defensive crisis is as bad as people think.
Pogba was pushed on his response and said that "if you're not happy, you can not give your best" when asked about what represents happiness and comfort for him.
Pogba excelled for France at Russian Federation 2018.
Mourinho had implied Pogba - whose agent Mini Raiola has reportedly been talking with Barcelona - had flourished under Didier Deschamps at the World Cup because he could not be distracted by his entourage or by his commercial obligations.
This would explain the continuation of the Barcelona speculation, but given that the English transfer window finishing early means that United would not be able to purchase a replacement for Pogba, the chances of him leaving before the end of the month are very slim.
The former Juventus midfielder had his detractors last season, where he struggled for form at times despite ending the term with 10 league assists and has endured rumours of a rift between himself and manager Jose Mourinho.
The France global was handed the captain's armband for Friday's Premier League 2-1 victory over Leicester in Antonio Valencia's absence. [Antonio] Valencia is captain, but Valencia is not here.
In comments widely regarded as reflecting continuing problems with his relationship with the United boss, he wrote: "I'll always give my best for the fans and my team mates, no matter what's going on".
"The decision belonged to him because Andreas Pereira comes from Valencia bench as a winger to play number six".
The Red Devils haven't won the Premier League title since 2013 when Ferguson's men beat Manchester City to the top-flight crown.