Daniel Agger admits he has developed a strong understanding with fellow centre back Martin Skrtel – but insists Liverpool's impressive shut-out statistics are down to a collective effort.

The Reds have conceded just 13 goals in 16 Barclays Premier League matches so far this term and clocked up four clean sheets in their last seven league outings.

Kenny Dalglish has already expressed his satisfaction at the form of the duo, but Agger remains adamant everyone in the squad deserves credit for their good run of results.

"We enjoy playing alongside each other," Agger said.

"I think Martin and I understand each other well and we complement each other well.

"We feel good together and it is important that, as a central defender, you feel that way. It was a great header from Martin (at Villa) and he's doing really well.

"But, to be honest, the whole team has defended well. It's not only about us. Everyone has made a difference.

"There is plenty of competition in the squad and that is the way it should be at Liverpool Football Club."

Agger has produced a series of eye-catching performances since returning from the cracked rib he sustained at Tottenham in September.

He accepts he has had his fair share of troubles with injury in the past but is now focusing on playing a major role in Liverpool's bid for success in 2012.

"I'm not thinking about my fitness anymore," Agger said.

"I won't say that I'm happy for every game I play but I really give everything in every game and see how long it lasts. That's the way to do it now.

"The whole team takes pride in clean sheets - if you keep one then it's easier to win.

"If we keep on playing like this, we will win a lot of games. Of course we can get back into the top four but there is a lot of work to do.

"We could have scored more goals against Villa but as long as we are winning we should be happy.

"We always say the Christmas period is crucial and it's about getting as many points as you can."