Pogba and Mourinho have been at loggerheads since his return from the 2018 FIFA World Cup, with both sides subtly hitting out at each other within the media.
However, the 25-year-old's latest comments on 'facing a fine' if he spoke his mind after captaining the side to a 2-0 win over Leicester City last week caused the latest bust-up between the pair.
According to United legend Paul Ince, Mourinho's alleged response to urge the Frenchmen to hand in a transfer request if he wants to leave - is fully dignified.
"You'd like to think that when Paul Pogba went away to the World Cup, where he was fantastic, he'd have come back with a winners' medal and felt a lot happier going into the new season," Ince told Paddy Power.
"But, since he's come back, he's been a nightmare, As a player, irrespective of whether you’re happy or unhappy, there are ways to conduct yourself.
"He captained United in their opening game of the season against Leicester, played brilliantly, and then came out with those quotes afterwards. I really can’t understand why he’d do that other than to get attention and set tongues wagging.
"Paul Pogba has got too much to say. Mourinho made him captain last week, which is a huge honour and one which he seems to underestimate. If Jose really thought so little of him, I doubt he’d have given him the armband.
"He had a great game, a real captain's performance, but no one is talking about that because they're too busy focusing on his off-field antics. I’m just not sure why he’s coming out publicly and disrespecting the club.
"He's let himself down. All he needs to speak about is the team and their performances, rather than himself. It shows a lack of professionalism and discipline.
"I can understand why Mourinho is livid, and I can see why he would tell Pogba to put in a transfer request," Ince added.
"If he's so desperate to instigate a move away from Old Trafford, then he should just go. There is no player bigger than a club – especially not Manchester United."