"In Madrid we played well in the first half and then it was surprising to see us lose some control after the break," said Benitez.
"Every manager is looking for the perfect 90 minutes and so this weekend I want to see us start as we did in Spain but then keep the same level throughout the game.
"If they score first it will be really difficult for us so we have to do everything perfectly from the first whistle. When we get a chance we have to take it because we know they will have chances as well.
"They have a lot of good players playing good football. They're passing the ball really well and scoring lots of goals. But we're going there with confidence, looking to work hard, play well and produce some nice football."