Detailed Instructions: In this task, you will be presented with a passage and have to answer a question based on your understanding of the events inferred from the passage. Try to find the best answer that is most likely to fill in "_". Note that the URLs in the text have been replaced with [Link].
Q: (CNN) -- With an awesome four-goal display from striker Robert Lewandowski in the first leg of their semifinal last year, Borussia Dortmund all but knocked Real Madrid out of the Champions League. On Wednesday when the teams met again in the first leg of the quarterfinals, it was Real Madrid's turn to inflict a heavy defeat and realistically seal a spot in the next round. And two men jeered by their own supporters last weekend played a key role, Cristiano Ronaldo and Gareth Bale. Both scored -- Ronaldo tied the single season record with his 14th goal before leaving due to injury -- as Los Blancos thumped an under-strength Dortmund 3-0 at Madrid's Bernabeu stadium. Dortmund pulled off a miracle victory in the 2013 quarterfinals against Malaga and it looks like only a similar scenario would see Jurgen Klopp's men progress.Real Madrid beats Borussia Dortmund 3-0 in the Champions League quarterfinalsCristiano Ronaldo equals the record for most Champions League goals in a seasonGareth Bale also scores for Real Madrid in the comprehensive first-leg victoryParis Saint-Germain defeats Chelsea 3-1 in Wednesday's other quarterfinal in Paris 
 Question:In the lone worry for _, Ronaldo was substituted with what appeared to be a leg injury in the 80th minute.
A:
Real Madrid