The Old Lady are set to battle Roma for the signature of the 27-year-old who is seeking a move from the Russian giant.
Axel Witsel could be on his way to Juventus after Zenit coach Mircea Lucescu said the Belgium international had asked to leave the club.
The midfielder has been linked with the Italian club, after a potential move to Everton reportedly fell through earlier this month.
Speaking after the Russian Premier League opener against Lokomotiv Moscow, Lucescu admitted that Witsel was keen to leave.
Witsel did not start the game, which ended as a 0-0 draw, entering the fray after 59 minutes in what could prove his last appearance for the club.