Former Liverpool striker Stan Collymore believes the club are lacking the defensive steel and that is stopping Kenny Dalglish's side challenging for major honours.
Liverpool were one of the busiest clubs during the summer transfer window and added the likes of Jordan Henderson, Charlie Adam, Stewart Downing, Jose Enrique and Sebastian Coates on top of January signings Andy Carroll and Luis Suarez.
However Collymore who made 61 league appearances for Liverpool between 1995-97, feels the Anfield club need to add a top class defender to the squad in order to bridge the gap between themselves and the likes of Manchester United, City and Chelsea.
Speaking on talkSPORT, Collymore said: "Jamie Carriagher is still one of the best defenders in the Premier League but you're always looking to freshen things up.
“They brought the player of the tournament in the Copa America, Sebastian Coates, who is supposed to be a very good central defender but it will take him time to adapt to life in the Premier League.
"When you look at Vincent Kompany at Manchester City, Rio Ferdinand and people like Phil Jones who has come into Manchester United, I don't think Dan Agger or Martin Skrtel compare. They are a level below.
“From a former Liverpool player’s perspective a top, top quality central defender in January, £20m worth, to be a leader from the back and eventually take over from and put competition on Jamie Carragher.”