Chelsea face Liverpool on Friday Night Football in what promises to be the latest instalment in a particularly modern rivalry.
The two teams have played each other 41 times since 2005, contesting cup finals, Champions League ties and plenty of Premier League and FA Cup encounters too. For comparison, Liverpool have faced Manchester United 29 times over the same period.
The dislike, then, is borne out of recent familiarity rather than geographical proximity. So when did it start?
2005 League Cup final
The animosity largely stems from the 2005 League Cup final, a full-throttle affair that saw Chelsea triumph 3-2 after extra-time, during which Jose Mourinho was sent off after appearing to shush Liverpool fans following Steven Gerrard's late own-goal equaliser.