Liverpool host Atletico Madrid at Anfield on Wednesday evening, with the Spanish side entering the tie with a 1-0 advantage from the first leg.
On paper, such a lead does not exactly appear the most daunting scoreline for the Reds, but against a Diego Simeone side, it is a huge ask.
Without an away goal in Madrid, Liverpool will need to win the game by at least two clear goals to progress, should Atletico not find the back of the net. It's not the most ideal scenario for Jurgen Klopp's side, particularly given their recent run of three losses in five games.
Such form has seen Atletico be made the favourites to qualify at 9/10, despite being as high as 6/1 to win the game inside 90 minutes. These prices suggest that the bookmakers are expecting a resilient setup from Simeone, a system his side tends to flourish in.