Introduction — The 94th Minute, The Step He Refused to Give Up
February 28, 2026. La Liga Matchday 26. At the Estadio Carlos Tartiere in Oviedo, Asturias, Atlético de Madrid were heading into added time still locked at 0-0.
The 94th minute. On the left flank, the ball was drifting toward the touchline. Everyone assumed it was out. Then number 34 threw his body at it. Julio Díaz. Twenty-one years old. A left-back making his first-team debut that very night. He stretched his leg at ground level and brought the ball back to life inside the white line. It found its way to Nahuel Molina on the right, whose low cross reached Julián Álvarez inside the penalty area. A curling left-footed shot hit the net. 0-1. The young man who refused to give up on a single step had decided Atlético's victory on his debut.
"In that final play, he fought so the ball wouldn't go out, and it ended up becoming a goal," Diego Simeone reflected after the match.
To understand that one moment, you have to go back eight years.
Chapter 1 — The Boy from San Fernando de Henares
Julio Díaz del Romo was born on January 10, 2005, in San Fernando de Henares, a suburb in the Madrid metropolitan area roughly 15 kilometers east of the city center, close to Barajas Airport.
His connection to football came through his grandfather. In a November 2025 interview with Spanish newspaper AS, Díaz explained: "My grandfather reached Primera División, but he had to quit early to take care of his family. I play football because of him. Without him, I wouldn't be here." As a young boy, Díaz played as a forward, scoring freely for his local youth team before joining Rayo Vallecano's academy. That was where the turning point came. "At Rayo and then at Atlético, they showed me I could be a real weapon as a left-back." The striker was reborn as a full-back.
In 2018, at the age of 13, Díaz moved to Atlético de Madrid's Academia. He left his family behind and began living in the club's youth residence. "Leaving home at 13 was tough. You're leaving your family behind. But everything was new and wonderful," he recalled in the same AS interview.
The eight years that followed would all converge in that 94th-minute moment.
Chapter 2 — Under Torres
Two names are essential to understanding Díaz's development within Atlético's academy: Fernando Torres and the UEFA Youth League.
In the 2022-23 season, Díaz was still just 17. Normally that age belongs to the youth categories, but he was fast-tracked into Atlético's U-19 squad and played in the UEFA Youth League. He was voted the second-best player in the group stage of that competition (Mundo Deportivo). The fact that a 17-year-old left-back earned such recognition on the European stage speaks to how high internal expectations already were.
In January 2023, Díaz extended his contract with Atlético. The following season, 2023-24, he became a regular in the Juvenil A (U-19) side that won the División de Honor, the top tier of Spanish U-19 football. That generation featured the likes of Javi Boñar, Rayane, Esquivel, Iker Luque, and Jano — a group crowned the best youth team in Spain. Leading them was Fernando Torres.
The bond between Díaz and Torres runs deep. "I've been under Torres for five years," Díaz told AS. "Having someone who is a reference point in world football as your coach is incredible." Within Atlético Madrileño, the reserve team competing in the Primera Federación, Díaz is a core piece of the defensive structure Torres has built on the left flank — a low-center-of-gravity full-back who can sprint up and down the wing repeatedly and deliver precise crosses.
In his first season with the reserves, 2024-25, Díaz made 32 appearances and scored twice according to Transfermarkt data. In the summer of 2025, he earned a contract extension through 2028 — a clear signal of the club's belief in his future.
Chapter 3 — A Left-Back Who Has Seen the World
There is another important thread running through Díaz's career at youth level: the Spanish national team.
In July 2024, at the UEFA U-19 European Championship held in Northern Ireland, Díaz was named in Spain's starting lineup at left-back. In the semifinal against Italy, Spain won 1-0 after extra time thanks to a goal from Pol Fortuny. Then came the final on July 28, against France. Díaz started and played the full match as Spain won 2-0. At 19, he was a European champion.
The following autumn, he was called up to the Spanish squad for the 2025 FIFA U-20 World Cup in Chile. His Atlético teammate Rodrigo Mendoza was also selected. Spain advanced through the group stage, beating Brazil 1-0 along the way, but were eliminated in the quarterfinals by Colombia.
In his AS interview, Díaz summed up the experience: "When Rayane and I got the call-up, we knew it was something unique. The level was incredible. Being knocked out was painful, but that tournament brought me closer to professional football."
After returning from Chile, Díaz went back to the daily grind of reserve team football. The Primera Federación is a world apart from international tournaments. The opponents include battle-hardened veterans who have played in the top divisions across Europe. "They've been in the best leagues in Europe. We're going the opposite way. But we're younger and hungrier," he told AS. Those words capture his mentality well.
When asked about his role models, Díaz named Jordi Alba. "He had speed, he was direct, he could join the attack. I think my style is close to his." And when it comes to the lineage of left-backs at Atlético, he is deeply aware of Filipe Luís. "Everyone knows what Filipe meant here. A leader's soul and a fantastic level on the pitch."
Chapter 4 — The "Personality" Simeone Saw
February 28, 2026. The match against Real Oviedo. There was a clear strategic context behind Simeone's decision to start Díaz. Three days later, on March 3, Atlético would face FC Barcelona in the Copa del Rey semifinal second leg, having won the first leg 4-0. Simeone rested his key players, making seven changes from the previous lineup. Dávid Hancko, Marc Pubill, and Matteo Ruggeri were all given the night off. Díaz took Ruggeri's place at left-back for his first-ever start with the senior squad.
The day before the match, Simeone had this to say about Díaz: "He's active, he's intensive. I hope he can play with the calm the match demands. I want him to show the good things he's been doing with the B team."
Over the course of the match, Díaz spent 90 minutes up against Haissem Hassan, a pacy French winger deployed on Oviedo's right flank. Against an opponent with sharp dribbling and acceleration, the 21-year-old debutant showed composure in defense. Going forward, he overlapped on the left several times, linking up with Ademola Lookman to create chances. Into the Calderon gave him a rating of 6.5, noting: "He did look raw at times, but he presented a great deal of energy on the left, especially when the team was in possession."
And then, the 94th minute arrived.
In his post-match press conference, Simeone praised Díaz with unusual warmth. "Not just that play — he had a good game. He had no difficulties in defense. He contributed to the team's progress, he had the personality to attack, he wasn't afraid. You could see from his body language that he was playing with the feeling that young players have when they get their chance. It's great work by Fernando and everyone at the Madrileño."
Then he added: "Now he has to keep it up. That's always the hardest part."
With his debut, Díaz became the latest in a line of nearly 50 academy graduates to reach the first team under Simeone. That list includes names such as Saúl Ñíguez, Lucas Hernández, Thomas Partey, Pablo Barrios, and Giuliano Simeone — all products of the same pathway, some of whom have gone on to star at Europe's biggest clubs. Díaz's name has now been added to that lineage.
Conclusion — Keep Believing
Just weeks earlier, in his AS interview, Díaz had said: "My dream is to debut with the first team and play at the Metropolitano." That dream came true at the Carlos Tartiere, away from home, in a way he never expected.
Speaking to MARCA after the match, Díaz said: "I never imagined it. When I walked into the meeting room and saw my name, a thousand things went through my head."
He has stood on the pitch in a U-19 European Championship final. He has faced Brazil at a U-20 World Cup. He battles hardened veterans in the Primera Federación week after week. And yet, starting a match for his own club's first team was something he "never imagined." In those words lies the full weight of the distance that academy players feel between themselves and the senior squad.
Eight years ago, a 13-year-old boy left his home in San Fernando de Henares and moved into Atlético's residence. All he carried with him was a passion for football inherited from his grandfather and the adaptability of a forward who had been converted into a left-back. From there — through Youth League recognition, a European Championship gold medal, a World Cup campaign, and two seasons under Torres — he arrived at that single play in the 94th minute.
After his debut, Díaz put it simply: "The advice I received these past few days was this — keep believing, keep working, and nothing is impossible."
Simeone said that keeping it up is always the hardest part. For the 21-year-old who climbed his way out of the cantera, the story has only just turned its first page.