Upsets are part and parcel of daily life and the world of sports is no exception to the rule. David defeats Goliath and when he does, the shockwave spreads like jungle fire across territories within a fraction of a few seconds. The best thing about upsets is that they occur when least expected. Interestingly, they affect fans of the loser more than anyone else including the person who gets robbed off his glory. Well, underdogs do count at times. Here is a list of top 10 greatest upsets in sports history that hit the whole world.