article_snippet: Barcelona's Lionel Messi and City keeper Joe Hart embrace at the final whistle at the Nou Camp .
article_snippet: Barcelona's Lionel Messi and Manchester City keeper Joe Hart share a hug after Barcelona sealed a 3-1 aggregate win to progress to the Champions League quarter-finals .
article_snippet: In the heat of battle, the players show mutual respect with a clap of the hands following another on-pitch duel .