When an 18-year-old makes club history in a key Champions League tie against Manchester City, it inevitably draws acclaim and the spotlight.
During his first start in the competition - and fifth game for the team - the young midfielder made a strong impression as the fifteen-time Champions League winners secured a 3-0 round of 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 Benfica, then assisted the Madrid side defeat the English champions in Tuesday's second leg to secure a quarter-final place.
At 18 years old, the midfielder became the club's youngest player to start twice in the Champions League knockout stages, surpassing star Vinicius Jr's previous mark by 10 days.
This talent is the most recent to emerge from the famed youth system and is quickly establishing himself as one of Alvaro Arbeloa's most promising young players.
He joined Real from CD Leganes in 2023, having formerly spent time at Atletico and Getafe youth teams, and initially featuring for the under-19 side, where he rapidly created a positive impact.
He worked his way up to the reserve side and it was during a friendly match in which they faced the academy's first team, then coached by the former defender, where the youngster is said to have caught the attention of the current Real boss, who replaced Xabi Alonso in the new year.
Reports would later describe the moment as "love at first sight," adding Pitarch excelled not only for his technical ability, but for the energy, character and drive he added to the team.
During the summer of 2025, ex-manager Alonso called up Pitarch to practice with the first team and gave him playing time in the warm-up matches.
Yet, it was Arbeloa's appointment that became the defining moment in his career as he was introduced as a late substitute in each leg against Benfica that led to the meeting with Manchester City.
"I have dreamed of this each night when sleeping, the very first time I started playing the game, every day you go to train and each day you play a match," stated the player after his first appearance.
"I've just fulfilled my dream with the greatest club in the planet and in the top tournament."
Handed a starting debut in the Spanish league against Getafe - where he spent four years after moving from Atleti in 2018 - he has retained his spot for the next four as injuries to Jude Bellingham and Ceballos provided an opening.
Pitarch has seized it with performances that have belied his age and experience.
"He is a extremely fast footballer, and you can observe his capabilities," remarked the coach. "He is extremely dynamic, with great stamina, work-rate and movement."
The player's mindset has also impressed his manager.
"His greatest quality is his character," added Arbeloa. "He constantly demands the possession, and even under pressure, he doesn't feel it.
"I realize people are surprised to see him make his debut in a European fixture, but he's playing because I had complete confidence in him to perform what he usually does.
"Thiago will keep receiving chances with the first team. It is delightful to coach a talent like him."
Pitarch was born in Fuenlabrada, in the Madrid region, and grew up deeply involved in the local game, moving through local academies before joining Real Madrid's renowned youth academy.
He possesses dual Moroccan and Spanish citizenship, offering him the choice to represent both nations at the highest level.
According to international regulations, footballers may appear for different countries at junior level without being permanently tied, with the ultimate choice only final once they appear in a official senior international match.
He has featured for Spain at youth level, turning out for both the U19 and under-20 teams, and took part in the 2025 Fifa Under-20 World Cup, where Spain made it to the quarter-finals.
Nevertheless, he has not yet decided to any senior national team, who are watching his rise with interest.
In a recent interview, Pitarch confirmed: "I haven't made my final decision yet. My situation is great with the Spanish federation, but I'll make a decision soon."
His situation mirrors that of other dual nationality players such as club colleague Brahim Diaz and Barca star Yamal. Whereas teenage Yamal opted for Spain, Diaz decided to play for Morocco.
At present, his attention is on making his mark in the Real side and repaying Arbeloa's faith.
He featured for over an hour in the two-one win at City, which completed a five-one aggregate success and a quarter-final matchup with the German champions.
He was replaced by fellow youth graduate in Manuel Angel to emphasise the coach's confidence in the next generation to aid the team pursue trophies to come.
After his impressive impact to date on the Champions League, the midfielder is tipped to play a key role in that.
"Arbeloa handles me the identical way. We handle it very naturally. I attempt not to think about it too much - I must deserve my minutes on the pitch," he said after the success at Etihad Stadium.
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