Mateta is on-loan at Palace from Mainz and is a priority target for new ASSE coach Pascal Dupraz, says But!.
Palace are happy to cut short Mateta's loan in January, but the player's contract demands are proving a problem.
As such, ASSE will need to reach an agreement with Mainz about covering a percentage of the striker's wages to help the move happen.
ASSE's wage cap is set at €50,000-a-month.
Need a VPN? Or seeking to switch? Then support Tribal Football by clicking here to sign up with our official partners NordVPN. Not only will you receive the best VPN experience, but also great discounts by signing up via Tribal Football. Thanks for your support!