Pogba is growing increasingly frustrated with United's refusal to consider his request to leave Old Trafford, Daily Star reports.
The World Cup winner intends to communicate his views directly to boss Ole Gunnar Solskjaer on his return to training this week.
The midfielder's agent, Mino Raiola, has twice traveled to Manchester to communicate his client's intention to quit United for a second time.
Real's directors have also tried to reach the Premier League club's board, who have refused to enter into talks.
But Los Blancos boss Zinedine Zidane is refusing to give up hope of bringing Pogba to the Bernabeu this summer.
According to Spanish newspaper Marca, he plans to grease the wheels of a potential transfer by offering Bale to the Red Devils.
Zidane has fallen out with the former Tottenham star and told him it would be beneficial for all parties if he joins a Premier League team.
United have previously been linked with a move for Bale under previous manager Jose Mourinho.
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