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Sean O'Malley added to his perfect record with a knockout of Eddie Wineland earlier this year at UFC 250. O'Malley faces Marlon Vera in the co-main event of UFC 252 on Saturday,

One week away from the most anticipated trilogy matchup in UFC history between Stipe Miocic and Daniel Cormier, we look back at the best trilogies in UFC history

Go behind the scenes with six athletes as they prepare for UFC 252, featuring Stipe Miocic and Daniel Cormier

Countdown to UFC 252 with exclusive inside-access to Sean O'Malley and Marlon Vera

Countdown to UFC 252 with exclusive inside-access to Junior Dos Santos vs Jairzinho Rozenstruik

Countdown to UFC 252 with exclusive inside-access to heavyweights, Stipe Miocic and Daniel Cormier

Watch Derrick Lewis backstage after his victory at UFC Vegas 6

Watch Chris Weidman backstage after his victory at UFC Vegas 6

Watch Darren Stewart backstage after his victory at UFC Vegas 6

Watch Yana Kunitskaya backstage after her victory at UFC Vegas 6

Watch Beneil Dariush backstage after his victory at UFC Vegas 6

Watch Tim Means backstage after his victory at UFC Vegas 6