The will to win. That's what it's going to take. Both teams appear talented, strong, evenly matched.
Will Ronaldo or Messi seize the opportunity to be the world's greatest? Or will someone else - Tevez, perhaps - or Henry - steal the day?
The experts, Lineker for example, say the defense will win the game and give the game to Manchester United. I'm not so sure. If Messi performs up to his Maradona-like promise, we'll see Ferdinand limp off the pitch clutching his calf with 15 minutes to go. If Rooney keeps his cool and takes control, we'll see Barca collapse.
I have no clue, as you can tell. That's why this is going to be a great game. Forget about the money. Bring it.