UFC 213: Romero vs. Whittaker is a mixed martial arts event produced by the Ultimate Fighting Championship held on July 8, 2017 at T-Mobile Arena in Paradise, Nevada, part of the Las Vegas metropolitan area.

UFC Fight Night 127: Werdum vs. Volkov was a mixed martial arts event produced by the Ultimate Fighting Championship that was held on March 17, 2018, at The O2 Arena in London, England. A heavyweight bout between former UFC Heavyweight Champion Fabrício Werdum and former Bellator Heavyweight Champion Alexander Volkov headlined this event.

The Ultimate Fighter 26 Finale (also known as The Ultimate Fighter: A New World Champion Finale) was a mixed martial arts event produced by the Ultimate Fighting Championship that was held on December 1, 2017 at Park Theater in Paradise, Nevada, part of the Las Vegas metropolitan area. Sijara Eubanks was expected to face Nicco Montaño in the finals of the season to determine the inaugural UFC Women's Flyweight Champion. However on the day of weigh ins, Eubanks was ruled medically ineligible for the card after a visit to the hospital overnight for allegedly miscalculating her weight cut, which led promotion officials to replace her with Roxanne Modafferi. A women's flyweight bout between promotional newcomer Priscila Cachoeira and former Invicta FC Bantamweight Champion Lauren Murphy was expected to take place at the event. However, the pairing never materialized due to alleged visa issues for Cachoeira.

UFC Fight Night 136: Hunt vs. Oleinik was a mixed martial arts event produced by the Ultimate Fighting Championship held on September 15, 2018 at Olimpiyskiy Stadium in Moscow, Russia. The event marked the promotion's first visit to Russia. The UFC arranged to use half of the venue and used a modified seating configuration for the arena. While not officially announced, the promotion was initially targeting a heavyweight bout between former UFC Heavyweight Champion Fabrício Werdum and Aleksei Oleinik to serve as the main event. However, on May 22, Werdum was flagged for a potential USADA doping violation and his status moving forward became unknown. On July 19, the promotion announced that a bout between the 2001 K-1 World Grand Prix winner and former interim title challenger Mark Hunt and Oleinik would serve as the event headliner.