Real Madrid star Vinicius Junior has said his team face early elimination from the Champions League if they make any mistakes against Atletico Madrid in their last-16 tie.
Los Blancos host their city rivals on Tuesday in the first leg before visiting Atletico next week at the Metropolitano stadium.
Madrid lost 2-1 against Real Betis on Saturday in LaLiga and Vinicius said their weak performance cannot be repeated in Europe.
“I think in the last game we lacked a bit of everything… we made too many mistakes, we defended badly and did everything badly,” the winger told a news conference on Monday.
“It’s better it happened in the last game as tomorrow we can make no mistakes, because these are knock-out games where you make a mistake and you’re going home, and we don’t want to go home so early.
“We’re here to keep improving our game and to put in a good performance tomorrow.”
Madrid coach Carlo Ancelotti said he hoped the slip-up against Betis was a one-time issue before the derby.
“We lacked attitude in the game against Betis, I hope it was an isolated incident,” Ancelotti told reporters.
“I think it is a very even tie and it will be decided in the second leg. It’s a tight game, (it will be) hard-fought