If you have dificult to make this (like me), try chose Argentina or Brazil, first match most be with a good team, like Holand or any 3 teams on top (Argentina, Holand and Brazil), because the first match always be easy, next match you have chance to take one of the three easy teams on bottom (France, USA or Corea), and the last match most be a easy team, is luck based, if you chose Brazil and the first match came with a easy team, restart and chose Argentina, if you have luck, you make the right path with: one hard team and two easy teams, the third match always is the most hard, so, most be a easy team to balance the dificult.
Good luck guys!!!