The Blues keeper expresses his despondency at the fact that the club's Champions League progression is no longer in their own hands following a 3-0 humbling in Italy
The Blues' convincing defeat leaves the Old Lady requiring just one point against already-qualified Shahktar Donetsk in their final Group F game to prevent the holders from reaching the knockout stages.
"We said before the game we had our destiny in our own hands but not anymore," Cech told reporters after the match.
"Now we have to do our bit to win our last game and hope destiny will be kind to us.
"Being realistic, Juventus played really well and they need a point. Shakhtar have already qualified so they don't need to take a chance on the result.
"It is a very sad moment because last season the Champions League was like a dream. I wouldn't say it's a nightmare but it's a huge disappointment."
The 30 year-old praised the Bianconeri's performance but argued that his team contributed to their own downfall by not being clinical in front of goal.
"I think we showed much better spirit than in the last few games," he continued.
"We did well and created some chances but, in such an important game, if you create chances you have to take them and that was the difference.
"They went ahead with a lucky deflection and the second goal was a deflection as well but they put on a very good performance and they did really well."