Liverpool have been one of the quietest clubs in the world in this summer’s transfer window. The Reds haven’t made a single signing yet, while Fabio Carvalho is the only player who has left the club on a permanent deal. Liverpool fans are frustrated with their club’s lack of transfer activity, and they are all desperate to see at least one new signing before the window shuts. There are a few players who could leave the club too. Sepp van den Berg is one of them. Mainz manager confirms he wants to sign Sepp van den Berg from LiverpoolVan den Berg returned to Liverpool this summer after a succes…