Liverpool are the only team in the Premier League not to concede a goal in their opening two matches.

And James Milner believes clean sheets are necessary to challenge Manchester City for the title this season.

"That's something we have to work on: winning all different types of games," the midfielder told Liverpoolfc.com.

"We know with the players that we have got going forward if we keep those clean sheets then we've got every chance of nicking a goal at the other end.

"So it comes from the 'keeper and all the way through the back four and all the way through the team and the way we play, everyone defends together."