2) Alexander-Arnold vs Renan Lodi
Trent Alexander-Arnold is one of the best full-backs in football at the moment. The Englishman brings so much to Liverpool's attack that it is difficult to represent his contribution in terms of just stats.
Atletico's left-back, Renan Lodi, will have the gargantuan task of dealing with both Alexander-Arnold and Mohamed Salah on his flank.
The reason why the battle between Lodi and Alexander-Arnold is particularly interesting is because the latter represents a greater danger than Salah for Atletico's defensive setup. Simeone's side are excellent at staying compact and defending without conceding space centrally. This could be effective in keeping Salah away from the danger areas.
However, by doing so, Atletico open up the possibility of giving Alexander-Arnold time and acres of space to play his dangerous crosses. Therefore, Lodi will be in charge of ensuring that Alexander-Arnold's opportunities to cross are as limited as possible.