| Guille Fernández | |
| Fullname: | Guillermo Fernández Casino |
| Birth Date: | 18 June 2008 |
| Birth Place: | Rubí, Spain |
| Height: | 1.81 m |
| Position: | Midfielder |
| Currentclub: | Barcelona B |
| Clubnumber: | 40 |
| Youthclubs1: | Espanyol |
| Youthyears2: | 2018– |
| Youthclubs2: | Barcelona |
| Years1: | 2024– |
| Clubs1: | Barcelona B |
| Caps1: | 7 |
| Goals1: | 0 |
| Nationalyears1: | 2022–2023 |
| Nationalteam1: | Spain U15 |
| Nationalcaps1: | 11 |
| Nationalgoals1: | 2 |
| Nationalyears2: | 2023– |
| Nationalteam2: | Spain U17 |
| Nationalcaps2: | 12 |
| Nationalgoals2: | 6 |
| Club-Update: | 08:59, 20 May 2024 (UTC) |
| Nationalteam-Update: | 04:18, 31 May 2024 (UTC) |
Guillermo "Guille" Fernández Casino (born 18 June 2008) is a Spanish professional footballer who plays as a midfielder for Barcelona Atlètic.
Born in Rubí, Barcelona, Catalonia, Fernández and Toni Fernández began their career at Espanyol, before making the switch to Barcelona in 2018.[1] 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.[2] The following year, in August 2023, he was included in Barcelona's under-18 squad, despite only being fifteen, for their pre-season preparation.[3] 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.[4] Continuing his meteoric rise at Barcelona, 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.[4] [5]
Fernández has represented Spain at under-15 level.
Fernández' cousin is fellow Barcelona player Toni Fernández,the pair's fathers are brothers and their mothers are sisters.[1]