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.
Aleksei Oleinik
Mark Hunt
Jan Błachowicz
Nikita Krylov
Shamil Abdurakhimov
Andrei Arlovski
Alexey Kunchenko
Thiago Alves
Khalid Murtazaliev
C.B. Dollaway
Petr Yan
Jin Soo Son
Rustam Khabilov
Kajan Johnson
Mairbek Taisumov
Desmond Green
Magomed Ankalaev
Marcin Prachnio
Jordan Johnson
Adam Yandiev
Ramazan Emeev
Stefan Sekulić
Merab Dvalishvili
Terrion Ware