Liverpool had a scout in attendance at FC Koln’s last match to check on goalkeeper Timo Horn and left-back Jonas Hector.
Reds boss Jurgen Klopp is eager to improve his options in goal and at left-back, and reportedly dispatched one of his scouts, Matthias Hamann, brother of Red Didi, to watch Koln in action against Schalke last weekend.
Shotstopper Horn has previously been linked with a move to Anfield, Koln reportedly turning down an offer for him in January, but the Merseysiders have maintained an interest ahead of a second swoop this summer.
The 22-year-old, who is also believed to be on the radar of Manchester United, Real Madrid and Arsenal, is said to be valued at Â£7million, a bargain price for a goalkeeper from whom big things are expected of in the future.
Meanwhile, Hector is believed to be another player Hamann was sent to check on, the 25-year-old having enjoyed a productive season thus far, registering three assists in the Bundesliga.
The Germany international is said to be valued at around Â£6million, according to German newspaper Bild, but Koln’s sporting director Jorg Schmadtke says he remains relaxed amid all the speculation, claiming they have yet to receive an offer for either player.