United said last night that Pogba was not for sale amid claims that Barcelona and Juventus want to sign the World Cup victor before the European transfer window shuts at the end of the month.
Manchester United sold Pogba in an £800,000 deal to Serie A giants Juventus in the 2012 summer transfer window.
Earlier this week, there was talk of Manchester United looking at Mina too.
Instead of praising Pogba's performances, Mourinho urged him to "understand" why he had done so well in Russian Federation and appeared to suggest the player lacked the same focus for his club.
His agent, Mino Raiola, is expected in Manchester this week to negotiate the transfer of Pogba out of Old Trafford.
Mourinho was in Russian Federation on punditry duty and offered little in the way of praise for Pogba, while during a pre-season interview with beIN Sports he suggested the midfielder "started average".
'I don't think it's about us getting the best out of him, it's about him giving the best he has to give, ' said Mourinho last month.
If the 55-year-old does not last at the 20-time Premier League champions this campaign, perhaps he would consider taking on an global job, something he has not done before.
"Why? Because it's closed for a month, where he can only think about football".
But Goal has claimed that United will not allow the 25-year-old to leave for the Nou Camp or any other club.
Mourinho dropped Pogba from his starting XI midway through last season amid concerns over his tactical discipline, while the Frenchman argued with his manager over tactics.