Liverpool are eyeing FC Koln pair Jonas Hector and Timo Horn.
BILD says Reds scout Matthias Hamann saw Koln lose 3-1 at home to Schalke on the weekend.
High on Hamann's agenda were goalkeeper Horn and defender Hector.
"There are no inquiries, offers or the like. The visit of Hamann does not make me nervous," said FCK chief Jorge Schmadtke.
"He has been seen many times before in our stadium."
Hamann is the brother of former Liverpool midfielder Didi Hamann and has worked as a scout for several English clubs.