Former Schalke defender Joel Matip, who is out for a long time, has less than six months left on his contract and may leave the club at the end of the season.
Dutch defender Virgil van Dijk is also in the final stages of his career at 32 years old, and a generational change in the back line is inevitable.
20-year-old defender Jarell Quansah has emerged and is gaining experience in the first team, as he played a full part in the recent FA Cup third round match against Arsenal.
Ibrahima Konate and Joe Gomez are waiting in the wings, but if Matip is to leave, at least one center back should be added.
According to the Daily Mail, Liverpool is also interested in Sporting defender Ousmane Diomande, who has received interest from various European countries. The player has played 21 games this season, scoring one goal and assisting one.
The Ivory Coast defender, who combines speed, skill, and strength like a modern center back, made his full national team debut at the age of 19.
He has been a mainstay at his club and is gaining a reputation as one of the most promising players of the future.
Also from Sporting, interest in Portuguese defender Goncalo Inácio has been frequently reported. In the past, Liverpool has been keen on Portugal, having acquired Luis Diaz and Darwin Nunez from Liga Bewin.
Will Liverpool be able to land the 20-year-old defender as their new center back?