Hailey Cowan Retires After Knockout Loss to Nina Milosevic at UFC Belgrade

American women's bantamweight Hailey Cowan announced her retirement from mixed‑martial arts after being knocked out by Serbian fighter Nina Milosevic in the first round of their bout at UFC Belgrade. Milosevic delivered a body punch that stopped the fight after 3 minutes and 41 seconds, earning a $100,000 performance bonus.

The loss dropped Cowan’s professional record to 7‑6 overall and 0‑4 in the UFC. In an Instagram post she thanked the UFC, her coaches and supporters, expressed gratitude for her career, and cited her faith as she looks ahead to the next chapter.