The Manchester United midfielder has been coming in for criticism following his £89m move to Old Trafford from Juventus last summer.
But the former Red Devil Hargreaves thinks it is unfair and that he is a top class player.
“Conte would love to have him at Chelsea”
In fact, the former England international thinks Real Madrid, Barcelona, Chelsea and Manchester City’s bosses would love to have him at their disposal.
Hargreaves told BT Sport: “To call him a problem is ridiculous.
“At Real Madrid [Zinedine] Zidane would love to have him.
“Barcelona would love to have him in their midfield.
“[Antonio] Conte would love to have him at Chelsea.
“[Pep Guardiola] would love to have him [at City].
“He’s not a £90m problem, I think he’s a £90m gift for this team.
“He’s going to be here a long time they’ve got to build around him and get the balance around him.
“I think he’s going to be a superstar, no question.”