However, he says the England ace will be out of range of Roma's transfer budget this summer.
Mourinho admits Villa chief executive Christian Purslow, who worked with Mourinho at Chelsea, knows that too.
Mourinho said: “Look, I think he knows where he wants to go, I think he knows the type of club to be able to buy him.
“My friend Christian Purslow also knows the value of the player, and of course that is not for Roma. If it is for Italian football, it would be a different club, not for us."