UFC 223: Khabib vs. Iaquinta was a mixed martial arts event produced by the Ultimate Fighting Championship that was held on April 7, 2018, at the Barclays Center in Brooklyn, New York.

Team dos Santos welterweight winner Tony Ferguson and Khabib Nurmagomedov was originally expected to headline this event.

[9] For the fourth time in four years, the bout fell apart, as Ferguson pulled out of the fight on April 1 due to a knee injury.

[19] The pairing previously met in November 2017 at UFC 217 with Namajunas winning the title via knockout in the first round.

[23] As a result of this act, the event suffered several changes: McGregor eventually turned himself in to the NYPD and was held in custody as charges were filed.

[29] The charges were dropped in late July after McGregor pleaded no contest to a count of disorderly conduct for his role in the melee and performed five days of community service.