The event marked the promotion's third visit to Chicago and first since PFL 3 (2024) in April 2024.[4]
The event featured the semifinals of 2025 PFL World Tournament in a middleweight, light heavyweight and heavyweight divisions.[5]
A bantamweight bout between former Bellator Bantamweight World ChampionSergio Pettis and former interim champion Raufeon Stots took place at this event.[6] The pairing was previously scheduled to meet for the bantamweight title and the Grand Prix at Bellator 279 in April 2022, but Pettis was forced to pull out due to sustaining an injury that required surgery.[7]
^2025 PFL Heavyweight Tournament Semifinal. An accidental groin strike rendered Romanov unable to continue; the judges picked him to advance to the finals.