I don't know how they're going to do it either, but the Swiss mode is like this: imagine that from the first round each match will determine who your next opponent will be, whoever wins their first match will go against another team that also won their first match ( and the same thing for those who lost), this way the teams will always face another team that has the same number of wins and losses
my guess is that they will eliminate the teams that don't achieve any victories and then move on to a normal Bracket