That is according to United legend Paul Scholes.
Scholes is not convinced that Zidane would turn his old club’s fortunes around straight away – stating that the job differs from his time at Real Madrid.
Speaking to BT Sport, Scholes had a stark warning for United fans.
“Is Zidane the right man, though?,” Scholes said.
“He went in to Real Madrid, who had a group of ready-made winners already.
“This is a totally different job; he would have to rebuild confidence with a squad that isn’t quite performing.”
Zidane took over at Real Madrid in 2016 after previously managing their B team.
Zidane, however, decided to end his time with Madrid on a high and surprisingly quit at the end of last season.
Scholes noted the talent that the 46-year-old had at his discretion during his time in Spain.
“He went to Real Madrid with so many great players, it was still difficult, but this would be a whole rebuilding job,” he added.
Scholes then pondered why things haven’t quite gone Mourinho’s way this season.
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“I think the assistant (leaving) is the big one,” he said.
“Rui Faria was with him for a long time, he had been at every club with him.
“All of a sudden he is gone and apparently, I don’t know, but apparently he was very influential in what he did day to day. He’s lost that and he (Jose Mourinho) does look a bit lonely at times. I think that’s a big part of it.”
The Red Devils have been on a dismal Premier League run as of late, picking up only three points in their last four games – with their last win coming away at Bournemouth at the beginning of November.
They’ll have the opportunity to return to winning ways on Saturday, though, when they host struggling Fulham.