The PFL 4 mixed martial arts event for the 2021 season of the Professional Fighters League was held on June 10, 2021. This was the fourth regular season event of the tournament and included fights in the Featherweight and Lightweight divisions. Boxing champion and Olympic gold medalist Claressa Shields made her MMA debut in the main event against Brittney Elkin.
Eagle Fighting Championship 44: Spong vs. Kharitonov was a mixed martial arts event held by Eagle Fighting Championship on January 28, 2022, in Miami, Florida, USA.
