The Sun says the Scotland attacking midfielder, 26, is out of contract at the end of the year and available for a low price before this window shuts.
Christie could sign a pre-contract with one of his suitors now and go in January, but pals say he does not want to risk being sidelined by Celtic.
Christie joined Celtic in 2015 following an impressive two-year spell at Inverness.
Need a VPN? Or seeking to switch? Then support Tribal Football by clicking here to sign up with our official partners NordVPN. Not only will you receive the best VPN experience, but also great discounts by signing up via Tribal Football. Thanks for your support!