Antonio Fernández Casino (আন্তোনিও ফার্নান্দেজ ক্যাসিনো) is a Spanish professional footballer who plays as a forward or winger for Segunda Federación club Barcelona Atlètic.

Born in Rubí, Barcelona, Catalonia, as a young player he joined the youth academy of Spanish La Liga side Barcelona. He was "considered one of the most promising talents at Barcelona" while playing for the club. In September and October 2024, Fernández was included in senior team's squad for several La Liga and UEFA Champions League games, but so far remained on the bench in all of them. On the 4th of January 2025, Fernández became the second youngest player to debut for Barcelona at age 16 years and 173 days.

He main position is striker. He is left-footed.

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