Premier League new boys Fulham and West Brom are chasing Mainz midfielder Jean-Pauli Boetius.
The playmaker is expected to be cashed in by Mainz this summer.
BILD says four clubs from across Europe are chasing Boetius' signature, with Fiorentina and Sevilla also keen.
Boetius has a deal with Mainz to 2022.
The midfielder was originally signed by Mainz from Feyenoord in 2018 for €3.5m.