The France international is reportedly unhappy at Old Trafford due to being asked to play in a defensive role by boss Jose Mourinho.
The Portuguese has denied rumors of a rift between the pair despite publicly criticizing Pogba after hauling him off during last weekend’s defeat at Newcastle.
French media have suggested that the 24-year-old has regrets about returning to United and wishes he’d joined Real instead.
The La Liga giants were interested in signing him but were not prepared to pay a then world record transfer fee.
But Los Blancos are now in disarray following a miserable season and president Florentino Perez is keen to oversee a major squad shake-up.