Sir Alex Ferguson believes Mourinho made a wrong decision in returning to Chelsea for a second stint.
The Portuguese left the Stamford Bridge before Christmas last year. And has replaced LVG at Manchester United.
Mourinho won the league on his return back to the Bridge. But he was dismissed after he won only nine of 16 games in the following season.
And Ferguson, a friend of the former Real Madrid and Inter coach as well as a club ambassador at United, believes Mourinho should never have returned to Chelsea.
“I thought Jose was wrong to go back to Chelsea, I really do,” the legendary former United boss told Sky Sports at a charity event.
“I think it’s always difficult going back to somewhere for a second time.
“The ability, charisma and personality, his success is high, won a European Cup twice with different clubs, won a Europa [League] with Porto, winning titles with all the teams he’s managed. His record – you can’t ignore that.
“I think Manchester United is the right kind of club for him, I really do. I think we’ll do well.”
United finished fifth in the league last season, but Mourinho has already added Zlatan Ibrahimovic and Eric Bailly to his squad with further signings likely.