Brasil had a bad tournament and lost. Sometimes the more talented team doesn't bring their A game.
Sorta like the US in basketball when we lost to Argentina in the Olympics.
Well I can see how the first part might be true but the second idea...
American Basketball players are worth more than Argentinian players... American basketball players openly state they will not represent the USA in the Olympic to avoid injury. This was not the case with Brazil and the 2006 World Cup.