City claimed the three points with an emphatic 5-0 victory at the Etihad Stadium in September, but Guardiola told Sky Sports News that this weekend's meeting will be a different kind of challenge.
Guardiola's men are 15 points clear at the summit of the Premier League, but the Spaniard is expecting a stern test from their opponents on Sunday.
"We know how complicated it is to go to Anfield, but hopefully we can show who we are. That's all I want to fight for with my players during the game," he told reporters.
"Of course they are challengers, going to Liverpool away is always tough. It is always a big challenge to improve and see on the bigger stages if we can handle the way we are. I love Anfield. For managers to play in these kinds of games on the big stages, I'll love to be there on Sunday.
"In football, when I win enough, perhaps the title, then two, three days or one week later, we're thinking of the next one. When you lose, one week later, there is another game so in football, it never stops."
City's trip to Merseyside is followed by a game against Newcastle United next Saturday.