The PFL 4 mixed martial arts event for the 2018 season of the Professional Fighters League was held on July 19, 2018, at the Nassau Coliseum in Uniondale, New York.
This was the fourth regular season event of 2018 and included fights in the featherweight and heavyweight divisions.
[2] Originally fights were set between Bekbulat Magomedov vs. Magomed Idrisov and Timur Valiev vs. Lee Coville, however Idrisov and Coville were forced to pull out for undisclosed reasons.
At first Carl Deaton and Darrick Minner were scheduled as replacements, but on weigh in day both missed the 146-pound limit, and as a result PFL elected to pull them off the card, and instead pair up their intended opponents to create Bekbulat Magomedov vs. Timur Valiev.
The point system consists of outcome based scoring and bonuses for an early win.