Last year, the first leg of their Champions League quarter-final produced one of the most scintillating halves of football in recent memory, courtesy of the Blaugrana Boys. (Evidence above.) The game ended in a draw, but Barcelona later advanced with a 4-1 thrashing in the second leg. This year, the world's two most exciting soccer teams meet a round earlier, in the last 16. Today's matchup (2:45 p.m. on Fox Soccer Channel) at the Emirates could be Arsenal's revenge...or it could get Messi. We'll be watching. [Game preview, via