"We will never forget it," Boca Juniors fans often say about River Plate's unprecedented decline to Argentina's second division in 2011. They repeated it, sang it, stirred up the wound.
But not only them: in Argentine football, forgetting is almost impossible.
The tournament won unfairly a few decades ago, classically lost due to landslides, some details about personality that should be from others: there are always anecdotes, results, achievements that You try to embarrass others.
In more than 100 years of fierce competition between Boca and River, there is a lot of data to choose from. And in this case all appear to be historians.
Therefore, whatever happens inside final of the Copa Libertadores, which for the first time will be debated between these two soccer giants, will be difficult to forget.
This is the most important Latin American club tournament. With the two biggest teams. So traditional "superclásico" will, for once, "superfinal". O "the end of the world", as they gave the titles of several newspapers.
Have never played a final like this. Have never played a final with such competition. Nothing will happen on Saturday 10 and 24 November.
Winning or losing, therefore, will increase understanding longevity or eternal death.
You play too much
Nobody except the head of state, Mauricio Macri, a famous fan and former president of Boca, said in an interview that "losers This will take 20 years to recover"
"This is a much played final, it's played too much, I think it would be better if one of the two who entered the final was Brazil," he said before the final match was determined.
And Macri is not the only fan I don't want this goal: During the semifinals in Buenos Aires, BBC World spoke with dozens of fans from both teams who expressed that feeling.
"Losing will leave us dead", "it will be a great ending, whatever it is", "it is a lot of emotional burden for now (economic crisis)". So the two sides' comments were heard; exaggerated like every word in this country.
But sports journalist Andrés Burgo agreed: "The fact that no one wants to play has produced the biggest when empathy between River and Boca fans that I remember. Because this is the most interesting final, but also the most unfair. "
"That loss will be too much punishment for the extraordinary campaign Boca and River carried out."
Both teams – explained Burgo- they are too risky in this final.
River played the advantage of the last few years, marked by victory in three key crossings with Boca, one of which was in the final (Copa Argentina, 2017); and Boca played its lead between 1998 and 2011, with those who won four Libertadores.
After the statement, Macri spoke several times about the game. That State problems.
Due to the rivalry of violence that has existed in Argentine football (the source of 135 deaths in the past 18 years), visiting team fans cannot go to local tournament matches.
A few weeks ago the classic city of Rosario, between Central and Newell's, had to be playing without an audience to avoid confrontation.
Macri said that the Libertadores final, a tournament without this ban, was "a great opportunity for all Argentine players to show maturity."
But the club's presidents and the Argentine Football Association did not agree and announced it there will be no visitors to avoid "inconvenience".
And although Macri called for "peace and harmony" with his request, on Monday a leaked video depicting River technician Marcelo Gallardo as a "culon".
Argentina is obsessed with symbols and history.
Some historians attribute it to the privilege of immigrants, in a constant search for its roots; but others relate it to a beneficial collective memory process no repetition which happened after the military regime in the 70s and 80s.
And being a country largely formed by immigrants, with almost no connection with the pre-Columbian past, new symbols of Argentine identity – from Perón to Indio Solari – live to the extreme.
That's why football clubs, not only Boca and River, are vehicles of ownership that are above the country itself: 70% of Argentina, according to the polls, they care more about the results of their clubs than the national team.
"Being an event that does not require anabolic, Boca River is also exaggerated in the media and painted as if the losers disappeared, which is certainly not true," Burgo added.
It might be exaggerated, then, to say that this match will never be forgotten. But of course it takes time.
Now you can receive notifications from BBC News World. Download the new version of our application and activate it to not miss our best content.