Geremi played for two years with Zizou at Real.
He told Ladbrokes: "Could he become Manchester United's manager? Based on his ability to surprise us already, I would say wait and see.
"At that level, with the performances that he demands, I don't think there's a team in world football that Zinedine couldn't manage.
"To manage a big club, you need a person with a big personality. Someone like Zinedine, a former player at the top level, can speak to his players and relate to them. He can speak to them without fear.
"It would be so easy for younger players in a team to receive a message from someone of Zidane's stature.
"I think he'd be a success at Manchester United. He has a great record and I think it's a challenge he'd like.
"The only thing is that he's the kind of person who'd want to take over a club at the beginning of a season.
"The Premier League is a new world for him; I don't think he'd take that risk in the middle of the season.
"I think he'd wait until the end of the season and construct his own team in pre-season."
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