UFC 219: Cyborg vs. Holm was a mixed martial arts event produced by the Ultimate Fighting Championship held on December 30, 2017, at the T-Mobile Arena in Paradise, Nevada, part of the Las Vegas metropolitan area.

[7] After a matchup with former WSOF Bantamweight Champion Marlon Moraes failed to materialize, Rivera was pulled from the event.

[10] A welterweight bout between Abdul Razak Alhassan and Sabah Homasi was originally scheduled for this event, but later shifted to UFC 220.

[15] On January 17, it was announced that Calvillo tested positive for marijuana metabolites, stemming from an in-competition sample collected in conjunction with the event.

[16] On January 25, Oleksiejczuk was notified by USADA due to a potential Anti-Doping Policy violation stemming from an in-competition sample collected in conjunction with this event.