The Survey Says: Spurs!
Right, let's settle this once and for all. According to the 2012 Football Rivalries Survey, 58.6% of Chelsea fans declared Tottenham as their main rival. Arsenal came second, Manchester United third. That's the official word from the fans themselves.
But hang on – it's not that simple, is it? Ask any Chelsea fan old enough to remember the 1970s and they'll tell you Leeds United were the sworn enemies back then. The 1970 FA Cup Final was an absolute bloodbath, wasn't it? Six red cards could've been shown that day. These days? Leeds have been bouncing between leagues like a yo-yo.
The Tottenham Factor
The rivalry with Spurs goes back to the 1967 FA Cup Final – the first all-London final, they called it the Cockney Cup Final. Tottenham won 2-1, and Chelsea fans haven't forgotten.
Then came the "Battle of the Bridge" in May 2016. Absolute carnage at Stamford Bridge, nine yellow cards for Spurs, three for Chelsea, players scrapping in stoppage time. Tottenham bottled the title that night – handed it to Leicester on a silver platter. Chelsea fans still sing about it.
Arsenal: The Modern Nemesis
Here's the thing though – the Chelsea-Arsenal rivalry has become the bigger headline-grabber in recent years. Five major finals between them since 2002: FA Cup, League Cup, Europa League. Ashley Cole's controversial move in 2006 poured petrol on the fire.
Under Mourinho, Chelsea ended Arsenal's title hopes repeatedly. The Gunners fans named Chelsea as the club they disliked most in 2008 – ahead of Spurs! Chelsea fans put Arsenal second on their hate list, behind Liverpool.
The Geographic Question
Fulham's stadium is barely three kilometres from Stamford Bridge, but let's be honest – the Cottagers have spent most of their history in lower divisions. Same story with QPR. You can't have a proper rivalry if you never play each other, can you?
The Verdict
So who is Chelsea's biggest rival? Tottenham leads the polls. Arsenal brings the big-game drama. Leeds holds the historical grudge. But unlike Arsenal-Spurs, there's no clear-cut answer. Maybe that's what makes supporting Chelsea interesting – you've got enemies everywhere.