The left-back cost Wanderers £2.5m when he signed from Real Madrid in the summer of 2010, but is out of contract at the end of the season.
And, although sporting director Daniele Prade admits the Serie A club would be willing to test the water by trying to bring him to the Stadio Artemio Franchi before transfer deadline day, he claims the Trotters are playing hardball.
"I think it would be hard to take him right away, because Bolton are making a stand," he told Sky Sports Italia.
"If we don't find an agreement with them, then we will do everything in June."
Prade also denied any interest in Juventus duo Alessandro Matri and Fabio Quagliarella, saying: "Neither of them will be arriving here. We have not talked with Juventus and we are just fine with our attacking options."