Celtic boss Brendan Rodgers is confident of keeping Moussa Dembele.
In January, Chelsea were linked with a shock deadline day swoop for the player.
And since then Manchester United, Liverpool and Arsenal are among the clubs monitoring Dembele's situation, says the Daily Express.
"I believed when Moussa came that he probably had two-year cycle," he said.
"That's what I saw. For me, I still think that's the case. All the conversations I have with him I have no doubt he loves it here.
“He needs another year of Champions League experience and the confidence of scoring goals and playing for such a big club, and probably then it'll be time to fly.
“That's the modern game. The big clubs in Europe are always crying out for a centre forward."