The superiority complex between the Premier League and La Liga has once again resurfaced. Simon Kjær of Sevilla last week said that "La Liga is the best league in the world. So far I have only played against the smaller teams in Spain and they are all really good and play great football. I sometimes doubt certain teams in England are that good". Does he have a point or is he having a laugh? To help answer that question, we've enlisted the help of stat experts. Originally a method to rate and rank chess players, the Elo system has since been adapted to a host of other sports – including football. The basic principle of the Elo system is that the difference in ratings between...
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