The talented youngster wants to move in the summer, as he believes that he has outgrown the club.
And the club's sporting director Rudi Voller has indicated that a summer sale is a possibility.
But nothing is to be decided until the season ends.
Havertz has five goals and two assists in 19 league games this term.
"We'll see how it looks in summer. He still has a contract until 2022 - these are, of course, the classic facts.
"There was already interest in the summer, but we told him that it would be good for him to stay with us for another year. And that was the right decision."