The Belgium international has welcomed the interest of Inter president Massimo Moratti.
But Guerra warns: "I do not know if there have been talks. He is not yet ready for Inter, Italy is hard and to be in the locker room with such stars is very difficult. He has not yet reached 20 years of age
"The Champions League will make him better.
"If I were his agent I would say Inter: Thank you, we will wait until next year."