3. Messi vs Manchester United (2011)
http://youtu.be/BhF8fzOB8Ws When Messi scored against United two years previously, it had set Barcelona on their way to becoming one of the best club sides of all time. By the time the two sides met in the Champions League final at Wembley in 2011, Guardiola's side were thought of as THE greatest. They destroyed Sir Alex Ferguson's team on the night, and Messi once again played a starring role. Goals from Pedro and Wayne Rooney saw the two sides level at the interval, before the Argentine influenced proceedings. Picking the ball up 30 yards from the goal, he ran at the United defence and unleashed a powerful long-range drive past Van der Sar. It was the key moment in the game, and he also played a big part in the third goal, producing a brilliant run that eventually saw David Villa make it 3-1.