A few years ago, when Liverpool won the Champions League, Jurgen Klopp’s side could look to full-backs Trent Alexander-Arnold and Andy Robertson with confidence that they would produce match-winning performances. Goals, assists, and corners taken quickly. To possess the two best full-backs in the world was a game-changer.

Real Madrid will meet Arsenal in the UEFA Champions League quarterfinal this afternoon. Here's what you need to know.

Gabriel Martinelli scores for Arsenal to put them ahead both on the night and on aggregate in their quarter-final against Real Madrid in the .