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Sport is all the better for rivalries, with atmosphere becoming ever better the more intense the rivalry with another team is.
Historically Manchester United and Liverpool are the two biggest rivals in English football but, according to Reddit, the pair are only fourth on the list when it comes to cumulative hatred of the opposition.
According to the survey, Portsmouth vs Southampton is surprisingly top, with Exeter and Plymouth second, they really hate each other on the south coast.
Pompey, now in League One, and Premier League Saints haven't played each other since the 2011/12 season, when both were in the Championship.
They last played against each other in the top tier in April 2005, with Pompey beating their fierce rivals 4-1 at Fratton Park, after Harry Redknapp had moved from Portsmouth to Southampton, before the Saints eventually got relegated.
There's actually only four all Premier League rivalries, which may surprise some, with the north London derby beating United vs Liverpool, Brighton vs Crystal Palace and United vs Manchester City as the biggest top tier rivalry.
A similar study revealed some more interesting findings about rivalries, with each teams top five rivalries showing some interesting results.
In the Premier League fans of 10 clubs named Manchester United as one of their top five rivals. With United themselves taken out of the equation and no data for Chelsea or Watford it's 10 teams out of 17 that consider them one of their biggest rivals.
No surprise that United's biggest rivals are Liverpool, followed by Manchester City, Chelsea, Leeds and Arsenal, though the order of the final three may surprise some.
Who do you think is the fiercest rivals in English football?
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