Kaka has recently been strongly linked with a return to Italian giants AC Milan.

"If Kaka stays I would be happy and I am happy if he wants to go. In football it is normal that the players play where they want," Mourinho told AS.

"He is a very good footballer and prepared to be at his maximum level. If he decides to stay, then perfect.

"If he goes, that's perfect too but we are not going to give him away for free. Those that want him have to pay for him."