The event was headlined by a UFC Heavyweight Championship unification bout between then champion Cain Velasquez and then interim champion Fabrício Werdum. But however, Velasquez pulled out his head for a bout between Werdum and Mark Hunt.
Fight Night: McGregor vs. John Francisco Trevino and Johnny Case Siver. However, it was announced that she had to go out. The fight was later rescheduled for this event.
Héctor Urbina was expected to face Albert Tumenov at the event. However, Urbina was replaced by Andrew Todhunter. It was medically disqualified when it was declined. Tumenov will receive his contracted show money.
On July 6, it was tested for testosterone metabolites of an exogenous origin. “He denied using anything,” Melendez was suspended for one year. Fight Night: Mir vs. Al Iaquinta Duffee on July 15, July 17, Augusto Montaño was announced as Melendez. He was also suspended for a year.