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.

Arsenal is all but guaranteed to reach the quarterfinals of the Champions League after recording the biggest-ever win away in the knockout stage of Europe's elite tournament, beating PSV Eindhoven 7-1 on Tuesday.