Definition: 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].
Input: (CNN) -- Real Madrid made sure the lights didn't go out on its title challenge as it sparked into life with a 2-0 win over Rayo Vallecano. Karim Benzema's 13th minute strike lit the fuse for Real before Cristiano Ronaldo's second-half penalty sealed the win. Real's margin of victory could have and should have been greater, but Ronaldo somehow contrived to miss from six-yards with the goal at his mercy. Rayo had their chances, particularly in the first-half through Andrija Delibasic and Mikel Labaka, but they were unable to find a way past the Real defence. Rayo's misery was compounded in stoppage time when Jose Manuel Casado was sent off after picking up a second yellow card.Real Madrid claim 2-0 victory at Rayo VallecanoKarim Benzema and Cristiano Ronaldo both on targetJose Mourinho's side eight points adrift of leaders BarcelonaSevilla remain unbeaten after 2-0 win at Deportivo La Coruna 
 Question:With just one league victory to its name before kick off, _ could not afford to slip any further behind arch-rivals Barcelona.

Real Madrid