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. A welterweight bout between Jake Ellenberger and Stephen Thompson, originally booked for a day earlier at UFC 189, served as the main event. The final of The Ultimate Fighter: American Top Team vs. Blackzilians took place at the event.