When an 18-year-old creates Real Madrid history in a pivotal Champions League tie against City, it naturally attracts acclaim and the spotlight.
In only his first start in the tournament - and fifth appearance for the team - Thiago Pitarch suitably impressed as the fifteen-time European champions claimed a three-nil last-16 first-leg lead at the Santiago Bernabeu.
The young player, who also made his club debut in the qualifying round a month ago with a cameo off the bench at Sporting Lisbon, then helped the Madrid side defeat the English champions in the midweek second leg to confirm a last eight place.
At 18 years and 226 days, the midfielder became the club's most youthful starter to begin two matches in the Champions League's latter rounds, surpassing star Vinicius Jr's previous mark by a week and a half.
The midfielder is the latest to emerge from the famed youth system and is rapidly cementing himself as one of the manager's most promising protegees.
He joined Real from CD Leganes in the summer of 2023, having formerly spent time at Atletico Madrid and Getafe's academies, and initially featuring for the under-19 side, where he rapidly created a positive impact.
Pitarch progressed to the reserve side and it was in a friendly match in which they played against the academy's first team, then managed by the former defender, where the youngster is said to have caught the attention of the present manager, who took over from the previous coach in January.
Spanish media would later describe the moment as "an instant connection," adding Pitarch stood out not only for his skill on the ball, but for the vitality, character and determination he brought to the team.
In the pre-season of 2025, former boss Alonso called up Pitarch to train with the first team and awarded him minutes during pre-season.
Yet, it was Arbeloa's appointment that proved the defining moment in his career as he was introduced as a second-half replacement in both ties against the Portuguese side that led to the meeting with Manchester City.
"I've dreamed of this every night when sleeping, the first day I started playing football, each day you head to training and each day you play a match," said the player after his debut.
"I've just fulfilled my ambition with the best team in the world and in the top tournament."
Given a first start in the Spanish league against his former club - where he was for four years after moving from Atleti in 2018 - he has retained his spot for the following four as injuries to Bellingham and Dani Ceballos created an opening.
Pitarch has taken it with displays that have belied his youth and inexperience.
"He is a extremely fast footballer, and you can see his capabilities," said Arbeloa. "He's incredibly dynamic, with excellent stamina, effort and movement."
The player's mindset has also impressed his manager.
"His standout trait is his character," added he. "He constantly demands the ball, and when pressed, he doesn't feel it.
"I understand people are surprised to see him make his debut in a European fixture, but he's playing because I had total confidence in him to do what he usually does.
"He will continue to get opportunities with the first team. It is delightful to have a player like him."
Pitarch was born in Fuenlabrada, in the Spanish capital's community, and was raised deeply involved in the local game, moving through youth setups before joining the club's renowned youth academy.
He possesses dual Moroccan and Spanish nationality, offering him the option to represent both nations at the highest level.
According to Fifa eligibility rules, players may represent different countries at youth level without being permanently tied, with the ultimate choice only final once they appear in a official senior international match.
He has featured for the Spanish national team at underage levels, turning out for both the under-19 and under-20 sides, and participated in the 2025 Youth World Cup, where La Roja made it to the last eight.
Despite this, he has not yet decided to any full national side, who are watching his rise with interest.
In a recent interview, Pitarch confirmed: "I have not taken my ultimate choice so far. Things are positive with Spain, but I'll make a conclusion in the near future."
This scenario echoes that of other bi-national players such as Real team-mate Diaz and Barcelona forward Yamal. Whereas teenage Lamine chose La Roja, Diaz opted to represent Morocco.
At present, Pitarch's focus is on establishing himself in the Real side and repaying Arbeloa's faith.
He featured for 74 minutes in the 2-1 victory at the Etihad, which sealed a 5-1 overall triumph and a quarter-final tie with the German champions.
His substitution by another academy player in Manuel Angel underscored the coach's confidence in the next generation to aid the team chase future success.
Following his notable contributions to date on the Champions League, the midfielder is expected to play a key role in that.
"Arbeloa handles me the identical way. We handle it very normally. I attempt not to think about it too much - I have to earn my playing time on the field," he said after the win at Manchester.
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