Viktor Claesson says facing Manchester City will be the biggest moment in FC Copehagen's history.
Ahead of the Champions League round16 first-leg clash, FCK defeated Elfsborg 5-4 on the weekend.
Sweden defender Claesson told the Göteborgs-Posten: "It was like that for large parts of the first half, but we must not be as hollow as we were now against the world's best team in the Champions League. We are not quite where we want to be but we have potential.
"It is the biggest match in the club's history or is close and touches it in any case.
"It's going to be big, but we're not going in and lying flat. That's not our tune. We want to achieve results and we make that demand on ourselves as well. We want to try to compete at Champions League level."