PSV Eindhoven are looking for Liverpool to compromise on their asking price for Sepp van der Berg as they continue to try and get their hands on the defender this summer.
Mainz had him on loan at the club last season and they had a €5m first refusal on the defender if they wanted to sign him on a permanent deal.
However, it is unclear how ironclad the agreement was between the two clubs as Van der Berg is scheduled to return to Liverpool next week for pre-season training and the Reds want much more than €5m.