Guille Fernández

Born in Rubí, Barcelona, Catalonia, Fernández began his career at Espanyol, before making the switch to Barcelona in 2018. In March 2022, following impressive performances for the club's Infantil A squad, he was promoted to the Cadet B team - playing with players a year older than himself - and marked his second appearance with a goal. The following year, in August 2023, he was included in Barcelona's under-18 squad, despite only being fifteen, for their pre-season preparation. He was given his debut in the UEFA Youth League by youth team manager Óscar López in September, becoming Barcelona's second-youngest player in the competition, behind Lamine Yamal. Continuing his rise through the ranks, Fernández was included in the first-team squad's training for the first time in October 2023, alongside fellow youth players Pau Cubarsí, Marc Guiu and Áron Yaakobishvili, due to the absence of a number of first-team players. In September 2024, Fernández was included in the first team squad for several La Liga and UEFA Champions League matches, but remained on the bench in all of them. On 1 September 2026, Fernández signed a five-year contract with Segunda División side RCD Mallorca.

Fernández has represented Spain at under-15 level.

Club

As of match played 5 September 2026

Fernández's cousin is fellow Barcelona player Toni Fernández; the pair's fathers are brothers and their mothers are sisters.