Trent Alexander-Arnold, a 20-year-old right back, put the ball down in the quadrant and then turned around as if he was about to leave the kick to a teammate. In an instant, he spun round again and whipped in a low cross that Barcelona's players weren't prepared for. Origi was ready, though, and he swept home a finish from eight meters (yards) into the top corner for his second goal of the game. (Photo | AP)