Longtime champion Georges St-Pierre returns from injury for a title unification bout against teammate and interim champion Carlos Condit. See both athletes' long roads to this high-level matchup and the fight itself.

Features bout from Yoel Romero vs. Luke Rockhold; from Feb. 10, 2018, in Australia.

Welterweight bout between former UFC Welterweight Champion Robbie Lawler and former UFC Lightweight Champion Rafael dos Anjos; from Dec. 16, 2017 in Winnipeg, Canada.

Lightweight contenders Rafael Dos Anjos and Nate Diaz battle.

Newly-crowned UFC light heavyweight champion Daniel Cormier makes his first title defense against vicious striker Alexander Gustafsson.

It's a story of friends turned foes as Anderson Silva defends his middleweight title against former teammate Vitor Belfort; examining the bad blood between the two, then their championship showdown from UFC 126.

Former middleweight champion Chris Weidman faces "Ultimate Fighter" winner Kelvin Gastelum in the main event; revealing their training regimens and how the fight plays out.

See how the fighters prepared, then watch the action unfold at UFC 133. Former light heavyweight champions Rashad Evans and Tito Ortiz get a rematch of their 2007 bout, and in the co-main event, Vitor Belfort takes on Yoshihiro Akiyama.

Heavyweight champion Cain Velasquez prepares to defend his belt against Antonio "Bigfoot" Silva while former champion Junior Dos Santos looks to make a case for another title shot against fellow heavy hitter Mark Hunt.

Former champions Dan Henderson and Mauricio Shogun Rua headlined UFC 139 in a five-round war that proved to be one of the greatest fights of all time. Go inside their training and then watch the 2011 instant classic between two MMA legends.

Features the heavyweight championship showdown between Stipe Miocic and Alistair Overeem. UFC Main Event showcases the best fights of recent vintage, set up by pre-fight, interview-driven features that reveal the backstories of the athletes.

Middleweight champion Chris Weidman and former Strikeforce champion Luke Rockhold train for their upcoming bout.

From May 28, 2017.

From Philips Arena in Atlanta, Rose Namajunas (6-2) looks to take down Karolina Kowalkiewicz (9-0). Namajunas, a takedown specialist will look to bring her opponent to the ground in this fight.

Features the rematch between Joanna Jedrzejczyk and Claudia Gadelha. UFC Main Event showcases the best fights of recent vintage, set up by pre-fight, interview-driven features.

Strawweight champion Joanna Jedrzejczyk takes on fellow striker Valerie Letourneau in a fan-pleasing matchup. UFC Main Event goes to Poland and Florida to check in on their training camps, then across the globe to Australia for the historic bout.

Features Joanna Jedrzejczyk vs. Karolina Kowalkiewicz for the UFC women's strawweight title from New York. From Nov. 12, 2016.

Flyweight champion Demetrious Johnson faces BJJ black belt Wilson Reis and contenders Rose Namajunas and Michelle Waterson square off in a pivotal strawweight battle.

Features Holly Holm's championship duel with Miesha Tate. UFC Main Event showcases the best fights of recent vintage, set up by pre-fight, interview-driven features that reveal the backstories of the athletes and their mindsets.

Featherweight title fight.

The third fight and rubber match between Dominick Cruz and Urijah Faber; from June 4, 2016.