But it seems United have turned down the shockingly-low bid.
Paul Pogba signed for United for a then-record transfer fee of €105 million in 2016.
Mourinho's decision to keep Pogba at Old Trafford has been reported by Miguel Delaney of the Irish Independent.
Barcelona are believed to be interested in the 25-year-old, who won the World Cup with France this summer, while Juve are also been linked with their former player.
"This season, especially after the World Cup that he's had, he's going to start expressing himself a lot more".
Pogba's agent, Mino Raiola, notoriously seeks to keep his players in the headlines for any reason.
United are aware that it could be a ploy by Pogba's representative to secure him a new contract on the same terms as £500,000-a-week top earner Alexis Sanchez.
Pogba would be the final piece of the jigsaw as Barcelona are unrelenting in his pursuit, but it's on the player's part whether to agree to a pay cut or stay put with a higher wage bill.
"Why? Because it's closed for a month, where he can only think about football".
Thoughts on Barcelona's cash plus players offer for Paul Pogba? "It's about him giving the best he has to give".