The Ultimate Fighter: American Top Team vs. Blackzilians

The Ultimate Fighter: American Top Team vs. Blackzilians Finale
A poster or logo for The Ultimate Fighter: American Top Team vs. Blackzilians Finale.
Information
Promotion	Ultimate Fighting Championship
Date	July 12, 2015 (2015-07-12)
Venue	MGM Grand Garden Arena
City	Las Vegas, Nevada
Attendance	4,844
Total gate	$291,000
Event chronology
UFC 189: Mendes vs. McGregor The Ultimate Fighter: American Top Team vs. Blackzilians Finale UFC Fight Night: Mir vs. Duffee

The Ultimate Fighter: American Top Team vs. Blackzilians (also known as The Ultimate Fighter 21) was the twenty-first installment of the Ultimate Fighting Championship (UFC)-produced reality television series The Ultimate Fighter. This season was the first to feature a gym vs. gym theme.

The series was officially announced by the UFC in February 28, 2015. For the first time ever, the UFC reality series featured a format pitting two of the sport's top gyms – American Top Team and the Blackzilians – against one another. The season was filmed in South Florida, where the two camps sit just miles apart, and the competitors were welterweights from each facility. An amount of $500,000 was earned throughout the season based on wins and losses for the winning gym.

Dan Lambert heads the ATT team, and rival Glenn Robinson heads the Blackzilians club. The series prominently features the rivalry between the two camps, which developed in 2011 after a band of ATT fighters defected and started their own camp with Robinson, who is the gym's owner but not their head coach. The two gyms are located just 20 minutes apart. The teams were made up of eight up-and-coming welterweights from each gym. The 16 men shared a house in the Miami/Fort Lauderdale area but instead of training amongst each other, the athletes still worked with their coaches at their respective gyms.

The actual fights took place at American Top Team in Coconut Creek and the Blackzilians' Jaco Hybrid Training Center in Boca Raton. The winning fighter earned home gym control for his team for the next bout. Opponents were not revealed until weigh-ins for the first time.

*Montgomery was removed from the competition on episode 4 due to medical reasons. He was replaced by Cristiano Souza on episode 7.

*Nakahara was forced out of the competition on episode 7 due to a medical suspension. He was replaced by Alexandre Pimentel.

The Ultimate Fighter: American Top Team vs. Blackzilians Finale (also known as The Ultimate Fighter 21 Finale) was a mixed martial arts event held on July 12, 2015 at the MGM Grand Garden Arena in Las Vegas, Nevada.