Jurgen Klopp’s side is proving to be one of the most exciting sides in the Prem so far thanks to their high-tempo attacking style.
The Reds have left a lot of promise for the 2017-2018 campaign having collected seven points in their first three matches in the top flight and thrashing Arsenal 4-0 at Anfield with their devastating striking trio of Mohamed Salah, Sadio Mane and Roberto Firmino.
But Allardyce told talkSPORT he’s not confident Liverpool will end their Premier League hoodoo this season.
“My only concern about Jurgen Klopp’s side is, defensively, are they sound enough to win the Premier League?
“Certainly from a possession, attacking and flair point of view, they have got it all. They have got goals and great energy. But set-pieces against seem to be a big problem for them.
“No matter how well they play against the opposition they switch off on a set-piece and that could end up costing them a lot of points.
“The game is played two ways: One is played in possession and one is played out of it. You have got to be masters of both of those if you are going to win the Premier League.
“The Premier League is generally won - certainly over the last 10,15 years - by the team with the best defensive record.”
The ex-England boss announced his retirement from management last May after saving Crystal Palace from relegation.
Liverpool are taking on Manchester City at the Etihad as the Premier League returns on Saturday
