The Ultimate Fighter 27 Finale (also known as The Ultimate Fighter: Undefeated Finale) was a mixed martial arts event produced by the Ultimate Fighting Championship that was held on July 6, 2018, at the Pearl Theatre in Paradise, Nevada, part of the Las Vegas metropolitan area. The featherweight and lightweight finals of The Ultimate Fighter: Undefeated took place at the event. A middleweight bout between Brad Tavares and Israel Adesanya headlined the event.