#3 David de Gea
Another United player who had a terrible game was David de Gea. The Spaniard was caught unawares as Messi curled in the first goal towards the far post, but he was totally to blame for the second goal that was conceded.
Messi swerved in and out of United's defence like they were school kids before firing a tame shot on goal - he had mishit it, really, so the Barca fans groaned, expecting De Gea to collect it with ease.
Instead, the ball trickled under him as he dived to pounce on top of it, and rolled into the back of the net. It was a disastrous error from De Gea which effectively spelt the end of the road for the Red Devils, as they were now 3-0 down on aggregate with no real signs of even getting a goal back.
To add insult to injury, Coutinho fired a shot from over 25 yards out, which floated past De Gea into the top corner. There wasn't a great deal he could do about it but it just showed how easy it was for the Catalans to score - it was effortless.