20. Alex Oxlade-Chamberlain v Olympiakos 2011/2012 https://www.youtube.com/watch?v=GxhTR_K_IJ8 Arsenal headed into the second game of the group stages after being held to a 1-1 draw prior to this against Borussia Dortmund in Germany. Olympiakos sat bottom of the group after they were defeated by Marseille. Arsenal fielded their latest signing and exciting youth prospect Alex Oxlade-Chamberlain and early in the first half the ball was played over the Olympiakos back four for a speedy Chamberlain, who controlled the ball well and had the composure to battle past two defenders before slotting the ball past experienced 'keeper Costanzo. Chamberlain became the youngest ever English Champions league goal scorer (18), a record he still holds today. Arsenal went on to win the game 2-1.