We've picked out three individual battles to look out for tonight as Liverpool host Atletico Madrid in a mouthwatering second leg of their Champions League last-16 tie.
Diego Simeone's side hold a slender advantage heading into the Anfield encounter after Saul Niguez's early goal at Estadio Metropolitano last month.
Here are a trio of duels that could prove pivotal this evening...
Fabinho v Joao Felix
If selected to operate as a second striker, Felix's positioning may come into the area of the pitch Fabinho usually patrols.
Felix was unable to take part in the first leg due to injury, but he's hit the ground running since his return to action.