If that happens which can only happen in a dream world in my opinion it will not be another big upset but it will the biggest upset of all history of World Cup football.I know that it was Korea that made possible that Germany to be eliminated in the group stage in a World Cup before some years but I heavily doubt we will see Brazil suffering a defeat from them,it is impossible based on team quality but since betting is involved anything can happen and we will just call it the biggest upset  .