But Vieira believes Pogba has improved his approach helping France reach the World Cup final.
He said, "If I understand that his attitude could divide the opinion? I can, yes.
"In Manchester, he did not have the level that people expected. There was a disappointment. And also a little negative pressure. But compared to what I could see in the last matches of the World Cup, he has crossed a course.
"It took him a while to understand the importance of his role on the team. But this player knows how to do everything!"