Telefoot says the midfielder has angered United board members by refusing a request to end speculation linking him with Real Madrid with a public denial.
Instead, Pogba's silence has left United directors fed-up and even prepared to dump the Frenchman this summer.
But on Real's side there is also some frustration, despite Pogba enjoying the support of coach Zinedine Zidane. Real president Florentino Perez is no fan of Pogba's agent Mino Raiola and is as unimpressed as United directors with the negotiating tactics.
United, however, are prepared to sell and will seek to start talks at €150m.