“He’s obviously an ambitious guy and if he wants to be a top top world-class player then he probably needs to go on and win lots of different things,” Wise told Express Sport.
“You’ve got Barcelona and Real Madrid – those are where top players want to end up.
“But at the moment it’s important that we’ve still got him at Chelsea and I think he loves the place.
“I’m sure in time he’ll make his decision about what’s best for him.
“At the end of the day, he’s a world-class player and has made such a difference at the start of this season.
“Do you want to lose him? Of course you don’t. He’s irreplaceable, if I’m being honest.
“One day, unfortunately, when he wants to go he will.
“Hopefully we get a couple more seasons out of him – at least.”