In most of football, a match is three points. In a handful of fixtures it is something else entirely - a result that decides what people say to each other at work on Monday, which side of a city a family sits on, and occasionally whether anyone goes to work at all.
The word derby, used for a match between two local rivals, probably comes from England, though the exact origin is disputed. One explanation points to the Shrovetide football played for centuries in the Derbyshire town of Ashbourne, a vast and barely refereed contest between two halves of the town. Whatever the source, the meaning has travelled: in almost every football-playing country, a derby means the one you cannot afford to lose.
One city, two tribes
The purest form is the shared city. Milan's two clubs, AC Milan and Internazionale, play their home matches in the same stadium, which means the derby is literally a question of who is nominally at home that day and which end the flags hang from. The fixture is called the Derby della Madonnina, after the gilded statue of the Virgin that stands on top of the city's cathedral and overlooks both sets of supporters equally.
Istanbul's rivalry is split by water rather than a stadium. Galatasaray are based on the European side of the city, Fenerbahce on the Asian side, and the match is known as the Intercontinental Derby because the two clubs' homes sit on different continents - the only major rivalry in world football that can claim it.
Buenos Aires, where it goes furthest
Argentina's Superclasico between Boca Juniors and River Plate is routinely described by visiting journalists as the most intense atmosphere in the sport, and the two clubs' histories are woven into the class geography of Buenos Aires. In 2018 the two met in the final of South America's premier club competition for the first time, and the second leg was so badly disrupted by violence outside the stadium that the match was eventually replayed in Madrid - a continental final between two clubs from the same city, played eight thousand kilometres away.
Elsewhere in the city, and across Brazil, derbies carry their own local weight. The Rio fixture between Flamengo and Fluminense is known as the Fla-Flu and has filled the Maracana for generations, and the phrase is used in Brazil even outside football to mean any contest where everyone must pick a side.
A league title is argued about for a season. A derby result is argued about at family dinners for decades.
When the divide is not sporting
Some rivalries sit on top of much older fault lines. In Glasgow, Celtic and Rangers - together known as the Old Firm - grew out of the city's Irish-Catholic and Protestant communities, and the match has carried that history with it, including the sectarian singing that both clubs and the Scottish authorities have spent decades trying to stamp out. In Belgrade, Red Star and Partizan were founded in the aftermath of the Second World War with different institutional backers, and the Eternal Derby still reflects that split.
These fixtures are the strongest argument against treating derbies as pure entertainment. The atmosphere that makes them extraordinary is the same thing that occasionally makes them dangerous, and the clubs involved generally know it.
El Clasico between Real Madrid and Barcelona is not a city derby at all - the clubs are several hundred kilometres apart. It became the biggest rivalry in Spain for political and regional reasons rather than geographical ones, which is why the Madrid derby against Atletico and the Barcelona derby against Espanyol both exist alongside it.
The ones that split households
Not every derby is hostile. On Merseyside, Liverpool and Everton supporters have historically mixed within the same families and the same streets, and for many years the fixture was known as the friendly derby - a description that has worn thin on the pitch while remaining broadly true in the stands. Similar arrangements exist in other cities where two clubs grew up together rather than in opposition.
What these fixtures share with the fierce ones is the sense that the result belongs to everybody, not just the people who went. Shops close early. Workplaces fill with people who have no interest in football the rest of the year. Children inherit an allegiance before they understand what they are inheriting.
The players caught in the middle
Few experiences in football are as exposed as a bad derby debut. A transfer across a city divide, rare but not unknown, can follow a player for the rest of his career and occasionally beyond it, and supporters of both clubs tend to agree that it is unforgivable without agreeing on anything else. Managers often leave an expensive new signing out of a first derby for exactly this reason.
Why they survive the money
Modern football has flattened a lot of local character. Squads are international, kick-off times are chosen to suit broadcasters on the other side of the world, and supporters are increasingly likely to follow a club they have never lived near. Derbies are the part that has resisted.
They resist because the players change and the fixture does not. A striker signed from another continent in August will be told within days what this particular match means, usually by somebody who has never played professionally. He will either understand it or he will not, and the crowd will know which within twenty minutes. That is a kind of continuity the rest of the sport has mostly sold off.
Which is why, for all the complaints about ticket prices and scheduling and the drift of football away from the places that built it, the derby remains the one day in the season when a club is unmistakably the property of its own city.
