FNC 20 took place on November 23, 2024, at the Arena Zagreb in Zagreb, Croatia. This anniversary event celebrated five years of the promotion and was headlined by one of the most anticipated regional grudge matches in years. In the main event, Miran "Slo Rocky" Fabjan once again backed up his pre-fight trash talk by defeating Aleksandar "Joker" Ilić via TKO (punches) at 1:47 of the second round. After a competitive first round where Ilić attempted to use his wrestling and take Fabjan’s back, Fabjan's power and relentless pressure eventually overwhelmed the Serbian star early in the second, forcing the referee to stop the fight.

FNC 20: Miran Fabjan vs. Aleksandar Ilić