Liverpool midfielder Gini Wijnaldum admits their lack of goals "is really strange".

The champions have scored only once in four Premier League outings since last month's ruthless 7-0 rout of Crystal Palace at Selhurst Park.

They do, though, remain the division's most prolific side this season, having netted 37 times in 18 matches so far.

And Wijnaldum sees effort and application as the keys to once again unlocking their well-established goalscoring potential.

“It's really strange, even for us, but that's something that can happen," the midfielder told Liverpoolfc.com, of the team's recent attacking difficulties.

“What we have to do right now is keep the confidence and try to change it around because I think we have the quality that we can change it around. We've shown it in so many games.

“The only thing we have to do now is work harder, work even harder than before, because you also have teams who are getting better. Teams analyse us, they were trying things to make it impossible for us to score goals, and that makes it even harder for us. So what we have to do is work harder to create chances and score goals.

“I think people are used to seeing us score a lot of goals, which we also showed against Crystal Palace. But this is the Premier League: teams are really good and they are getting better every year.

“Also with technology you can analyse teams really good, know how they play and everything, so it's getting much more difficult for us to score goals.

“But still then we have the quality to make it even more difficult for them to stop us scoring goals, so what we just have to do is work hard, keep confidence and do the things we did before."