It’s not terribly unusual for the UFC to have a fight cancelled on the day of the event. It probably happens about once every four months. However, it’s exceedingly rare to see the main event cancelled as an event is proceeding. Unfortunately that proved to be the case with UFC Vegas 65, as Derrick Lewis fell ill the day of the fight—forcing the cancellation of his main event contest with Sergey Spivak.
In response, the UFC pushed Kennedy Nzechukwu vs. Ion Cutelaba into a makeshift main event. There were clues leading up to the announcement that something was amiss.