Zenit have been chasing the Italy international for much of the preseason.
‚ÄúThere is nothing new right now,‚ÄĚ agent Davide Torchia told Sportitalia.
‚ÄúWe are in negotiations with Zenit, but there‚Äôs no need to sprint. The move could be completed within days.
‚ÄúAt the moment, however, it‚Äôs all in stand-by.‚ÄĚ