The reigning European title-holders kick off their Champions League title defence against the Italian champions at Stamford Bridge and Cech knows that it will have to be a much-improved performance, particularly defensively, to record a victory.
"It's always better if you can keep a clean sheet in the Champions League as it relieves the pressure," the Czech Republic international told the club's official website.
"It's been a positive start in that sense and we want to keep it going. Against Juventus it will be important as I don't see a game with many goals.
"They've been doing well and they will want to keep progressing. They have quite a few younger players who came through a couple of years ago who are still there, they have a very good defence and of course [Gianluigi] Buffon in goal, so it's going to be a very difficult game."