Real Madrid will go into the tie as clear favourites after squeezing past rivals Atletico Madrid in a controversial penalty shootout. Arsenal have the added challenge of being away for the second leg, but there are reasons for Mikel Arteta’s side to believe they can cause an upset.

Real Madrid beat Atletico Madrid in a Champions League penalty shootout — again — to keep its title defense alive Wednesday and advance to the quarterfinals

One of the marquee matchups of the early Champions League knockout stage is set for a thrilling conclusion as Real Madrid travel to meet derby rivals Atletico Madrid on Wednesday in the second leg of their Round of 16 matchup.