Celtic manager Neil Lennon has denied the club have received an offer for Tom Rogic.
Zenit Saint Petersburg have reportedly lodged an offer worth £9 m for the Australia international.
"I haven't heard anything and there have been no enquiries," Lennon told The Daily Record.
"It's just speculation at the moment, as far as I'm concerned.
"He is a good player and I want to keep all of my good players. He's not fit yet, but, hopefully, he'll join the group at some stage next week."
Rogic prefers a move to the Premier League however, with Leicester City and Southampton both linked with the 26-year-old.