The Blues, who led 1-0 from the first leg, scored two away goals to earn them a draw at the Nou Camp and a place in their second European final in four years, and the Czech Republic keeper insists that getting a goal in Spain was integral.
Cech said: "We scored the away goal - that was key. Twice we scored goals. We fought for 90 minutes in the first game, and in this game when it was even worse and we were down to 10 men, 2-0 down.
"We did what we could. It was fantastic and we got our reward. We tried to survive and we survived pretty well."
Chelsea now turn their attentions to the Premier League where they face Queens Park Rangers at Stamford Bridge on Sunday.