The Blues continue to bask in their statistics-busting 1-0 win in Wednesday's first leg at Stamford Bridge, which saw goalkeeper Cech produce one of his best performances of the season to keep Barca at bay.
Speaking of the next clash, he added: "We've done well in the past there and need to reproduce the same kind of performance that we did and like we have before. It will be really important to score an away goal as well but we seem always to score there and, hopefully, we can replicate that."
Chelsea once again proved the world and European champions' nemesis, as Barca have now failed to beat the Londoners in their last six meetings.
That includes three score draws at the Nou Camp, where Barcelona boast a terrifying record of 27 wins and no defeats in 30 games this season, with 104 goals scored and 16 conceded.
Chelsea will need even more defensive discipline on Tuesday on a pitch much bigger than their own, as well as the same luck they have enjoyed in spades of late, and the kind of wasteful finishing Barca conspired to produce in the first leg.
Cech added: "This performance was all about the focus and concentration, to stay disciplined all the time and not give them space, even though you could run for three minutes and not see the ball.
"We had to fight from the first to the last minute. We've done the maximum we could do against such a great side.
"We've had some good results against them in the past and used that experience again. We made it really tight, but will have to play the same way in the second leg."
Source: PA
Source: PA