20. Guillermo

Guillermo joined the Club in the U10 age group in summer 2018.

Standing out for his physical strength since arrival, he makes the most of it to make runs into the box from midfield. He quickly moved through the youth levels and became the youngest ever player to debut for Barça Atlètic on 31 March 2024 during a match away to Osasuna Promesas. He has played eight times for the development side since, and is now registered to play for them albeit still part of U17 age group.