Borussia Dortmund coach Jurgen Klopp has urged his side to remain resilient when they travel to the Bernabeu for the second leg of their semi-final clash with Real Madrid after claiming a convincing 4-1 win in the first leg on Wednesday.
Four goals from Robert Lewandowski put one foot in the Champions League final for Dortmund, although Klopp insists there is still room for improvement.
Lewandowski's early opener was cancelled out by Cristiano Ronaldo before a second half flurry put the German side in command.
"It was unbelievable, a great game by my team," Klopp told Sky Sports. "It was so difficult to play because they are so strong and fast, and in counter attack are brilliant.
"I think the first 25 minutes were great, and then we lost a little bit of our game - not so much but enough to let them come up and they made the draw."
Moments before Ronaldo's equaliser, Dortmund looked certain to be awarded a penalty when Marco Reus appeared to be tripped by Raphael Varane and Klopp insists it was a positive sign that his players didn't let that decision affect their momentum.
"What we did at the break, we said maybe you think there is the wrong decision of referee' [for Real's goal]," Klopp added. "But the last game [against Malaga] we had the wrong decision of the referee and we were the winner, so nothing happens - the only thing that has changed was that we needed to score in Madrid.
"So go back to you your strong 25 minutes and take the right half with you, because the first-half the most time we played about the left wing and we wanted to play more on the right and it was much better, you saw more of the team. Second half it was like Robin Hood, and arrow into the box with our attacking players - it was great to see."