[5] Fernandez faced Saskia D'Effremo for the vacant ISKA World Super Featherweight (−56.4 kg) championship at Fight Night III on November 5, 2016.
[12] During Enfusion 72, held on October 6, 2018, she lost a unanimous decision against Lizzie Largillière, despite rallying in the last two rounds.
[13] Fernandez faced Maite Botella for the FEKM Spanish (−53 kg) Championship at Xtreme Fight Show on June 23, 2018.
[17] Fernandez won the vacant ISKA World K-1 Rules Super Featherweight title on November 30, 2019, with a unanimous decision win over Kelly Denoiko.
[19] Fernandez faced Grace Spicer for the vacant WBC Muaythai World Flyweight title at Combat Fight Series 4 on March 9, 2020.
[28] Fernandez faced Supergirl Jaroonsak on August 5, 2023, at ONE Fight Night 13, losing the bout via unanimous decision.