Sebastián Hernández has one loss against one opponent on his boxing record. For a list of Hernández's best fights, refer to "Best fights of Sebastián Hernández".
On December 27, 2025 Sebastián Hernández faced off against Junto Nakatani at age 25. He was coming in with a record of 20-1 (18), and Nakatani was 27 years old and with a record of 31-0 (24). Hernández lost the fight via 12-round unanimous decision.
