Another consideration for United is the imminent return of Marcos Rojo from injury, with the Argentina global defender also preferred by Mourinho, pushing Shaw further down the left-back pecking order.
Spurs boss Pochettino suggested in a recently released book that he was frustrated with Mourinho after he went out of his way to embrace Dier following Tottenham's game at Old Trafford last December.
There are some swap deals that appear to be nearly too obvious.
The twenty-two year old has been strongly linked with a move away from Old Trafford with his relationship with manager Jose Mourinho reportedly frosty and a potential part-exchange deal with fellow full-back Rose could benefit both clubs.
Shaw is struggling to get playing time at United after falling out with manager Jose Mourinho and could meet Pochettino when second-placed United host third-placed Tottenham in the league on Saturday. And I think he really wants me to play under him again'.
'He used to call me his son.
"He has a future here but the situation is not easy because he comes from injury after injury after injury", said United boss.
"But in terms of the attitude that we didn't like and knowing the players and knowing how good people they are, yes, I believe that was an isolated case".
He is delighted that his player gave a candid and honest opinion on his former manager and feels it reveals a lot about the Manchester United defender's character. In this moment I can't give him that.
He said: "I would be very disappointed if his words were different". Not I could have done better, but I should have done better, because he knows I can be better.
"If he was a midfield player, central midfielder player, then yes, because we only have two left backs we have so many options, so the situation is not easy". The manager that helped him to come to the first team, the manager who brought him to the best point of his career.