Match report: Newcastle edge Reds
"It's certainly something we need to be better in," the manager told Liverpoolfc.com.
"For the team to have confidence, it's important that you look like you can score a goal.
"We didn't look as if we could threaten so much. I'm a creative and attacking coach, and we have seen over my time here how we build teams to score goals in order to win games.
"But at the moment it's not quite happening for us. We just need to analyse the game and work harder to make it work."
Liverpool will need to work on their goal-scoring abilities quickly as the travel to Spain to face Real Madrid in Champions League on Tuesday (21:45 kick-off) action before hosting Chelsea at Anfield on Saturday (14:45 kick-off).