Owen Hargreaves believes that Liverpool have to continue keeping clean sheets in order to succeed this season.
Jurgen Klopp's side were brilliant in keeping out Napoli in their Champions League victory, although VAR did correctly rule out a Leo Ostigard headed goal on the one occasion that the Italians looked dangerous.
However, in the Premier League, Liverpool have struggled to keep out the opposition as they have lost their last two games against Nottingham Forest and Leeds.
Domestically, the Reds have only kept four clean sheets in their 12 games and conceded 15 goals in the over eight matches.