Jose Mourinho's biographer Manuel Pereira says that the manager's isuses with Paul Pogba came down to the Portuguese's desire to control his players.
The manger had highly-publicized issues with the French midfielder, who has been unleashed under new manager Ole Gunnar Solskjaer.
A known extrovert that enjoys social media, Pogba never truly flourished under Mourinho before the manager departed the club midway through the season.
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Pereira, who also said Mourinho was too demanding for some players, added the strain was caused by Mourinho's desire to control his players, a tendency that doesn't work as well in modern football.