Celtic are running the risk of losing Jonny Hayes, with several English Championship sides now on his trail.
The reliable Republic of Ireland international is out of contract at the end of the season and manager Neil Lennon is keen to see that deal extended.
But the 32-year-old now has strong interest from England and can open pre-contract talks from January 1.
Championship sides Preston, Middlesbrough, Stoke and Cardiff are all keen on Hayes.
Lennon had expected Celtic to open talks over a new deal more than 10 days ago but the champions have still to speak to Hayes or his agent.
The Dubliner has never hidden his desire to remain at Parkhead but would also be open to a return to England.
He came through the ranks at Reading before he headed north and made his name with Inverness and Aberdeen. He got his dream move to Celtic in 2017.
Hayes has been used mostly at left-back under Lennon this term.
