Liverpool are close to completing a loan deal for Schalke's Turkey central defender Ozan Kabak.
The 20-year-old will join Liverpool until the end of the season in addition to the deal which brings Preston North End's Ben Davies to Anfield for £2m.
Marseille's Duje Caleta-Car was also a potential target with the Reds exploring a number of options in defence because of injuries.
Liverpool are missing experienced centre-backs Virgil van Dijk, Joel Matip and Joe Gomez because of injury, while midfielder Fabinho, who has been standing in at the back, is also out.
"It's probably clear that in a normal transfer window, without any issues, we would not look at Preston [to see] if there's a player for us or something like that," said Liverpool boss Jurgen Klopp.