Bayer Leverkusen accept they face losing Kai Havertz at the end of the season.
Sport1 says Bayer believe they can raise 100m from the 20 year-old's sale.
A raft of Europe's biggest clubs are in contact with Bayer about a deal for Havertz.
Bayern Munich, Barcelona, Real Madrid, Manchester City, Chelsea, Manchester United, Liverpool and Arsenal have all been mentioned as suitors.
Bayer are basing their asking price on the 120m paid by Atletico Madrid for former Benfica whiz Joao Felix.
