The 62-year-old Netherlands coach, who has signed a three-year deal with the Red Devils, will take charge at Old Trafford after the conclusion of the World Cup in Brazil.
And former Manchester United striker Van Nistelrooy feels that Van Gaal shares similar qualities to former Red Devils boss Ferguson.
“Everyone will know who is the boss. He does everything himself,” Van Nistelrooy told ESPN.
“Louis has assistants, but he does all the coaching – every session. He’s very hands-on. He is a Ferguson-type character and it’s what they need now. Louis is a good manager.”
He continued: “He will start work immediately at Manchester United after the World Cup. Louis won’t have a holiday. He has to start immediately.
“There is pre-season training and he has to get to know the players. Then there is the tour to America and into the Premier League season.
“He will look at the players at United and if he sees someone he likes he will give them a chance. He likes to do that. He is prepared to promote. He won’t just go out and just buy players.”
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