From the 2017/18 season, Fernández played in the second team of FC Barcelona in the second Spanish league.

For the 2020/21 season, the Spanish first division club Frigoríficos Morrazo signed him.

[2] In the 2021/22 season, he improved his rate to 147 goals in 30 appearances and was again named the best left winger.

[4] Fernández made his debut for the Spanish senior national team on 4 November 2021, in 33–29 win against Romania.

[6] He won the bronze medal with the Spanish squad in the 2023 World Championship.