Mourinho has long been known for getting his desired messages across through the media.
"He plays the media beautifully Mourinho, I have to say," Hargreaves told the Daily Star.
“If you ever watch a press conference, he gets out what he wants to get out at all times.
“You would never hear him say he's misspoke or said something he didn't want to say and got caught up in the emotion of it.
“I think he's incredibly prepared. If you watch his press conference he'll get facts out, content that he wants to get out, not necessarily specific on the question.
“So obviously (with PSG) there's something to it in terms of maybe a bigger picture but the fact of the matter is there's not many better clubs in the world of football than Manchester United and a more loyal fan base.
“There's hundreds of managers around the world who would love to be in that position.
“I know PSG spent a lot of money on Neymar and Mbappe but outside of what PSG have done this summer, what Manchester United have done say over the last five years, how many teams have been able to compete with them financially.
“It almost looks like they have unlimited resources to go along with the fan base and tradition.
“I think Manchester United is a dream club for him."