If you're a fan of the World Cup, you probably had your sights set on a winner before the tournament kicked off. Maybe you really liked how Spain's team was shaping up (despite the coaching shifts), or you wanted to root for an underdog such as Japan or Croatia. Goldman Sachs, which knows a little something about probability and risk, built a sophisticated data model to predict the World Cup's eventual winner. This model leveraged machine learning to simulate 1 million possible evolutions, and updated throughout the tournament, according to Bloomberg. With that kind of setup, you'd think that the algorithms would get at least a few match outcomes right.