Cristiano Lucarelli says any club interested in him must speak first with Shakhtar Donetsk.
Linked with AC Milan and a return Livorno this week, Lucarelli said: "Before knocking on my door, it is necessary to knock on the club's door. In football it is difficult to give certainty, because the next day things can completely change.
"Sometimes certain things are said on the eve of a big game, like the one we face against AC Milan, but I have the right experience to best deal with this type of talk.
"Before a game like this, it is better not to speak of Livorno and Milan, but only about the Champions League."