Seyedo has a point...Brazil might be getting some calls going their way but they've been better than their opponents with the arguable exceptions of Croatia and Chile – and even there I'm not sure either of those teams deserved to win those games.
They might be unconvincing, but lots of eventual title-winning teams are. Spain were never convincing in 2010, but they did enough each game to progress and eventually win the tourney. That's what Brazil's doing. The idea that they're only getting through on referee bias is ridiculous.