With the World Cup such a huge spectator occasion, mistakes and controversial decisions are even more under the microscope.
English referee Howard Webb was in the spotlight during Brazil's second-round clash with Chile on Saturday when he and his assistant elected to rule out a Hulk goal for handball, with replays proving inconclusive.
With Webb's decision in mind, we elected to take a look through the archives for some past controversies.
So what are the most controversial decisions and mistakes that have been made in World Cup competitions down the years? Here's the top 10.