The reigning champions go into the Champions League semi-final second leg behind in the tie after a 2-1 defeat in Turin and the full-back is wary of the threat posed by Juve??on the counter-attack.
Carlo Ancelotti???s men have been suspect at the back in recent weeks and Carvajal is looking for a calm and composed performance from his side.
“We need to win, that is fundamental. However, above all, we need to have a cool head, be patient and not go crazy,” he told the club’s website.
“The game is 90 minutes long and we need to make that seem like a long time for Juventus and make them suffer without the ball.”
Carvajal gave away the penalty, converted by Carlos Tevez, at the end of a counter-attack which gave the Italian champions the advantage in last week’s first leg.
However, he is confident Madrid will be less generous in front of their vociferous home crowd.
“They created danger from us giving the ball away or our errors,??? he said. ???I think if we stay calm, have patience, move them around, then we will win the game.
“After the first leg the feelings of the coach and the players were clear. We cannot commit so many errors in easy passes because that breathed life into them.”