FNC 14 took place on December 16, 2023, at the Zetra Olympic Hall in Sarajevo, Bosnia and Herzegovina. The event saw a sell-out crowd witness the return of local icon Tomislav "The Beast" Spahović after an eight-year hiatus. In the main event, Slovenian kickboxing veteran Miran "Slo Rocky" Fabjan pulled off a major upset by defeating Spahović via TKO (punches) at 3:14 of the third round. Despite Spahović's early wrestling dominance, Fabjan's cardio and striking eventually overwhelmed the hometown favorite. The co-main event saw another shock as UFC veteran Rony Jason handed Tariel Abbasov his first professional loss via third-round submission.

FNC 14: Tomislav Spahović vs. Miran Fabjan