Following the conclusion of the UEFA Champions League quarterfinals, only four teams remain in the hunt for European glory.

It wasn't pretty but it sure was effective, and Arsenal are headed to the UEFA Champions League semifinals for the first time since 2009 after beating Real Madrid 2-1 on Wednesday (5-1 on aggregate).

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.