The Blues have their first big test of the season as they take on last year's league champions.
But Werner believes his team has a lot of quality, and they can make an impact in the upcoming Premier League game.
"I am looking forward to the game because you have a lot of good teams and with Liverpool, one of the best teams in the world," Werner told reporters.
"They won the league last year and they have the same team as last year, so they will be as strong as last year.
"So it will be a really good challenge for us to see how far we are.
"We had not so good a pre-season because a lot of players come from holiday, a lot of players didn't play any games before our first game against Brighton, a lot of players couldn't play, and that made it a little difficult to fight together but I think for this we did very well.
"We will improve game by game but now we have to play on Sunday and we try to win the game.
"We are playing against a strong team and they have such good players, not only Virgil van Dijk, the whole defending part of Liverpool are very good. They conceded the least goals in the league and it is a great team in every position.
"But we also have great players and we have the quality to beat them. It will be an interesting game."