Simple doubles tourney. You will be playing all across the continents- teams will square off across on Africa, Australia, North America, South America, Europe and (Far East) Asia, all at once. In the case of a tie (3 wins each) you will play on World 2.1 for the tiebreak decider. The team that wins will go on in the tourney, the other team is eliminated.
@Patrickaa - I considered antarctica map, but unlike the first 6 maps its a speciality map, requires a strategy and previous experience. The other 6 maps anyone can really play. Would be a unfair disadvantage to anyone who hasn't played antarctica before. (this being said I could be completely incorrect, but at first glance looked very much like a speciality map to me)