The 23-year-old defender believes Real Madrid can still progress to the Champions League final.
The 2-2 draw at the Bernabeu against Valencia over the weekend, means that Real Madrid have all but blown their hopes of winning La Liga this season.
Four points behind Barcelona now and with just six points to play for, the title race is practically over, indicating that for Real Madrid, the last piece of silverware to fight for, remains the Champions League.
That task is also complicated by the 2-1 defeat suffered in Turin last week, which Real Madrid must now look to overturn, if they're to reach the final and defend their European crown.
Speaking via the official Real Madrid website, full-back Dani Carvajal underlined: "We need to win, it's crucial. Most of all, we need to keep our heads cool, be really patient and not go crazy. It's a game of ninety minutes, so we must try to ensure we make it a long game for Juventus, and for them to suffer without the ball."
Despite the whistles at the Bernabeu from fans, aimed towards various Real Madrid players, Carvajal is convinced: "On Wednesday we'll feel the support of our fans. I'm sure they'll be our number twelve, and if we get some goals in the first half, they'll be a very important factor."
Regarding the first-leg defeat against Juventus, which Real Madrid must now overcome, Carvajal observed: "It's something we have to learn from. They created danger when we lost the ball, or made mistakes. I think if we keep calm, show plenty of patience and move the ball around well, the game will go our our favour."
23-year-old Carvajal admitted a lack of precision, was the key factor which lead to losing against Juventus in the first-leg, noting: "After that first game, the sensations of the manager and of ourselves was very clear. We can't afford to make so many mistakes from easy passes, or relatively easy deliveries, because we gave them an advantage in that regard."
Turning attention to his team-mates, questioned if he thinks Cristiano Ronaldo remains the best player in the world, without hesitation, Carvajal responded: "For me, yes. There's no other player quite like him."
Karim Benzema remains a slight doubt ahead of the second-leg, but Carvajal pointed out just how important the Frenchman is, concluding: "We all know Karim. He's a fantastic player, a number nine who gives us so many things, and hopefully he'll be ready for the match on Wednesday. If the manager decides to play him, I'm sure he'll be important for us."