The PFL 5 mixed martial arts event for the 2021 season of the Professional Fighters League was held on June 17, 2021. This was the second regular season event of the tournament and included fights in the Welterweight and Light heavyweight divisions. The event was headlined by a welterweight clash between the former UFC title contender and Bellator welterweight champion Rory MacDonald and the former UFC veteran Gleison Tibau.

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.

UFC Fight Night 156: Shevchenko vs. Carmouche 2 was a mixed martial arts event produced by the Ultimate Fighting Championship that took place on August 10, 2019 at Antel Arena in Montevideo, Uruguay. A UFC Women's Flyweight Championship bout between current champion Valentina Shevchenko and former UFC Women's Bantamweight Championship challenger Liz Carmouche headlined the event. The pairing met previously under a regional promotion banner in 2010 with Carmouche winning the first bout via second-round TKO (doctor stoppage).

UFC Fight Night 170: Lee vs. Oliveira was a mixed martial arts event produced by the Ultimate Fighting Championship that took place on March 14, 2020 at Ginásio Nilson Nelson in Brasília, Brazil. A lightweight bout between former interim UFC Lightweight Championship challenger Kevin Lee and Charles Oliveira served as the event headliner.

UFC Fight Night 142: dos Santos vs. Tuivasa was a mixed martial arts event produced by the Ultimate Fighting Championship that was held on 2 December 2018 at Adelaide Entertainment Centre in Adelaide, South Australia. A heavyweight bout between former UFC Heavyweight Champion Junior dos Santos and Tai Tuivasa served as the event headliner.

ACA 195: Kornilov vs. Vakhaev was a mixed martial arts event that took place on Friday, November 7, 2025 at the Sibur Arena in St. Petersburg, Russia.