Rivalries do tend to be geographic. In football, the thought of sharing the same city with another group of fans is often too much to bear.
Sometimes, though, the hatred runs deeper than that felt for your noisy neighbours. Sometimes it is about ideologies. Sometimes, it becomes personal. That is how the rivalry between Leeds and Chelsea, two sides separated by over 200 miles, began.
For a country where the division between the North and the South appear to be rearing its head again, the footballing rivalry that embodies it is also making a comeback.