"People say this is the biggest game of the season," said the Reds boss. "I don't look at any game as being big or small. It's another game where you get three points for winning.
"The only difference this time is the fact that if we win we'll move a bit closer to them. It's an opportunity to help yourself and dent their chances at the same time.
"United have started the season very well. They're sitting top of the table at the moment and that's where everybody wants to be.
"In this fixture last season, we got our reward for playing very well and won 3-1," he said. "But we won't get anything on Saturday because of what we did the last time we played United.
"We know that what we're up against and so do they. Nobody will have an easy 90 minutes. That's what the Premier League is all about."
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