FNC 11 took place on May 28, 2023, at the Arena Zagreb in Zagreb, Croatia. In the main event, local star Ivan Erslan delivered a dominant performance, defeating Brazilian veteran Dirlei Broenstrup via first-round TKO in just under two minutes. This landmark event, titled "Fight for Legacy," was the promotion's first show in the capital's largest indoor arena and featured a stacked card, including Jordan Barton capturing the featherweight title and Đani Barbir successfully defending his middleweight belt.

FNC 11: Ivan Erslan vs. Dirlei Broenstrup