West Ham United boss David Moyes rates Sunday's opponents as title contenders.
The Hammers go to Anfield in excellent form themselves.
And Moyes said: "Some teams have got ahead of Liverpool but Liverpool have pegged them back. It's a big, hard game. The crowd and the stadium play a big role at Anfield.
"In recent years we've given them tough games and we'll try to give them a good game on Sunday. We know we're playing a good side and we want to show what we can do.
"They can challenge for the title. People say we've made a good start to the season but Liverpool definitely have as well. They've won all their games and they're introducing new players into their squad.
"From a distance, they look like they're getting back into their best form.
"I finished above Liverpool a couple of time as Everton manager and got a few good draws too."
