The event was headlined by a Middleweight Championship bout between the current champion Chris Weidman and former UFC Light Heavyweight Champion Lyoto Machida. The bout was originally scheduled to headline UFC 173 on May 24, 2014. However, the bout was delayed after Weidman sustained a knee injury which required a minor surgery.
A light heavyweight bout between the coaches of The Ultimate Fighter: Brazil 3Chael Sonnen and Wanderlei Silva was originally scheduled for UFC 173. However, the fight was moved twice - first being on May 31, 2014 at The Ultimate Fighter: Brazil 3 Finale, and now was expected to be contested on this card. Silva was ultimately pulled from the fight entirely after he failed to submit an application to fight in the state of Nevada, as well as his refusal to undergo a random drug test and was replaced by Vitor Belfort. The bout between Sonnen and Belfort was to be contested at middleweight. However, Sonnen subsequently failed his random drug test and was removed from the bout and ultimately retired from the sport. The following day it was announced by MMA writer Kevin Iole that Belfort had also been removed from the card due to the inability of the UFC finding him a new opponent.
During the event, Stefan Struve suffered a "near-fainting episode" and his bout with Matt Mitrione on the pay-per-view was canceled. The first fight of the main card was already happening when the news was revealed on Twitter and it was officially confirmed on the broadcast after the Brimage-Doane fight ended.
The following fighters were awarded $50,000 bonuses:
Fight of the Night: Chris Weidman vs. Lyoto Machida
Performance of the Night: Ronda Rousey and Rob Font
The following is the reported payout to the fighters as reported to the Nevada State Athletic Commission. It does not include sponsor money and also does not include the UFC's traditional "fight night" bonuses.