FNC 16 took place on May 5, 2024, at the Sports Hall Dr. Mate Demarin in Medulin, Croatia. The event was held as a memorial for Damir Demarin, a former deputy mayor of Medulin who was a dedicated sports advocate. In the main event, Tomislav "The Beast" Spahović successfully bounced back from his loss at FNC 14 by defeating Polish veteran Maciej Gradecki via unanimous decision after three rounds. Spahović utilized his signature wrestling and physical pressure to control the fight, securing his first victory in his return to the cage.

FNC 16: Tomislav Spahović vs. Maciej Gradecki