Bayer Leverkusen are monitoring developments with Manchester United winger Antony, who is also wanted back at Real Betis.
A move to Germany would see Antony link up with former manager Erik ten Hag for the third time.
The Dutchman brought Antony to United for £81million in 2022, having signed him for Ajax two years earlier.
He is being lined up as a possible replacement for Florian Wirtz, who looks set to move to Anfield.
Liverpool have made a £109m offer for Leverkusen's star but they value him at £120m.