The Ball Spins Slowly at Alfonso Lastras: When a Derby Must Be Won With Reason

In San Luis Potosí, someone painted on a wall. Not with a brush, but with anger. A mural of the local club was defaced just days before the match, and in the video that circulated, a group of visiting supporters appeared with provocative words aimed at the people of this city. The match had not yet been played. But the battle had already begun, and it began in a place football never wants to enter: off the pitch. Diego Mejía, head coach of Atlético de San Luis, stood before the press that week. He did not speak about formations. He did not speak about pressing, about defensive blocks, about build-up play. He spoke about one thing only: restraint. "Let the rivalry stay on the pitch," he said. "We are going to go out to death for this match, but we will let football decide the winner." It sounds like an ordinary statement. But if you have followed Mexican football long enough, you know it is not ordinary at all. Because when a coach brings the message of rivalry to a press conference before a match, it means he is worried about something more specific than tactics. He is worried about early cards. He is worried about retaliation. He is worried about the possibility that a 22-year-old player loses his composure in a single moment and turns three points into a catastrophe. This match is the Clásico de la 57, matchday 13 of Liga MX. The name comes from the MX-57 highway, the road connecting San Luis Potosí and Querétaro, two cities roughly 200 kilometres apart. It is not a historic derby like the Clásico Nacional or the Clásico Tapatío. But it is the derby of two lands, and in Mexico, regional derbies sometimes carry more tension than those celebrated by the national media. The match kicks off at 19:00 on a Tuesday, at Estadio Alfonso Lastras Ramírez. A midweek slot, a late evening at roughly 1,850 metres above sea level. I have watched many matches in terrain like this. When you play football at nearly two thousand metres on a midweek evening, the body does not recover the way it recovers at sea level. That does not mean the visiting team will collapse. It only means that in the final 25 to 30 minutes, the quality of ball structure declines, and football becomes more direct, more transition-heavy, and more chaotic. That is why I think this match will not be shaped by tactics. It will be shaped by emotion. Mejía said: "We are in need of adding points at home." This is the most important sentence of the entire press conference, and it is not a sentence about tactics. It is a sentence about the table. At matchday 13 of a 17-round short tournament, table position begins to become decisive. A team sitting in the play-in contention group cannot afford to drop points at home, especially against an opponent in the same group. When a coach says "we are in need of adding points at home", he is not being modest. He is saying that his team is in an uncomfortable position. And he added: "It doesn't matter to us how the rival arrives." I have heard this line many times in my career. It is a classic linguistic device to suppress complacency or fatalism in the dressing room. When a coach says the opponent's form does not matter, it is usually because the opponent's form is a talking point in the press. And usually because that form is not good. But what really caught my attention was not what Mejía said. It was what he did not say. He did not speak about the lineup. He did not speak about injuries. He did not say which players would start. He offered no tactical information at all. Across the entire press conference, not a single piece of tactical vocabulary appeared: no formation, no pressing scheme, no build-up pattern. That is not a coincidence. It is a choice. When a coach chooses to speak about emotion rather than tactics before a derby, he is performing a governance function. He is trying to prevent a scenario he knows can happen. And in Mexican football, that scenario has a frightening precedent. In March 2026, at La Corregidora stadium in Querétaro, a match between Querétaro and Atlas turned into a riot. Images from the stands spread around the world. The league was suspended. Subsequent matches were played behind closed doors. And the league imposed prolonged restrictions on away supporters nationwide. It is a scar Mexican football has not healed. I am not saying this match will repeat that. I am saying that any incident involving Querétaro supporters, however small, will immediately be placed in the context of 2026. And that is why Mejía's message is not merely a moral appeal. It is a risk-mitigation measure. There is an important legal detail here. The defaced mural was outside the stadium, not inside it. That typically weakens the disciplinary chain against the visiting club, compared with misconduct occurring inside the venue. But it strengthens the case for local public-security measures rather than football sanctions. It is a distinction few notice, but it determines who will be held responsible if things spiral out of control. What is notable is that in the entire original article, there is no statement from the league organisers, the Mexican football federation, the police, or the club's security department. That silence is informative. It suggests that, at the time the article was written, the incident had not escalated to the level requiring an institutional response. But it also suggests that everything remains in a state of waiting. And in that state of waiting, the game must still be played. I have spent years watching derbies in smaller leagues. And I learned one thing: these derbies are not decided by which team has the better squad. They are decided by which team controls its emotions better. In a normal match, technical quality is the best predictor. In a derby, technical quality becomes the worst predictor, because variance spikes. A team that plays better for 85 minutes can lose because of one loss of composure in the 86th. That is why I think Mejía's message is the most important tactical message of this match. Not because it speaks about tactics, but because it admits that tactics will not be enough. He said: "So that they respect our city." This is a coded statement. It is not merely an appeal to home supporters. It is a message to security authorities, that the club wants to see a visible police presence. It is a message to the league organisers, that the club is doing its part. And it is a message to his own players, that any act of retaliation would be a betrayal of the city. Mejía is speaking to three audiences at once. That is a skill few coaches possess. But there is one thing he cannot control. He cannot control what happens in the stands. He cannot control what happens on the streets. He cannot control what happens inside the head of a 19-year-old supporter who has had a few beers and is looking for a fight. And that is the tragedy of football. Those who work hardest to control the match are often those with the least control over what happens around it. This match will take place on Tuesday. It will start at 19:00. It will last 90 minutes, plus stoppage time. And in those 90 minutes, two teams will try to win three points. One will succeed. One will fail. And when the final whistle blows, there will be those who cheer and those who fall silent. But one thing I know for certain. If this match ends without any incident off the pitch, it will be Mexican football's greatest victory this week. Not because some team won. But because a derby took place exactly as it should: on the pitch, and only on the pitch. The goal of a loser is not a goal scored in a defeat. Sometimes, it is a goal scored in a match where no one was hurt. I learned to hear the match with my eyes, and to hear the rivalry through silence. And in the silence of San Luis Potosí this week, I heard something I have heard many times before: the sigh of a city hoping the ball will slow down, just once, long enough for people to remember this is a game. The ball spins slowly. And in that slow spin, we see how many human fates it carries.