UFC Fight Night: Tuivasa vs. Tybura

UFC Fight Night: Tuivasa vs. Tybura (also known as UFC Fight Night 239, UFC on ESPN+ 97 and UFC Vegas 88) was a mixed martial arts event produced by the Ultimate Fighting Championship that took place on March 16, 2024, at UFC Apex in Enterprise, Nevada, United States.

Background
A heavyweight bout between Tai Tuivasa and Marcin Tybura was scheduled for UFC 298. However, the bout was moved in order to headline this event.

A bantamweight bout between Charalampos Grigoriou and Toshiomi Kazama was expected to take place at the event. However, Kazama pulled out and was replaced by Chad Anheliger.

Thiago Moisés and Brad Riddell were expected to meet in a lightweight bout at the event. However, Riddell pulled out in mid-February due to undisclosed reasons. He was replaced by promotional newcomer Mitch Ramirez.

At the weigh-ins, three fighters missed weight:
 * Natan Levy weighed in at 156.5 pounds, half a pound over the lightweight non-title fight limit.
 * Chelsea Chandler weighed in at 137 pounds, one pound over the bantamweight non-title fight limit.
 * Danny Silva weighed in at 148.5 pounds, two and a half pounds over the featherweight non-title fight limit.

All three bouts proceeded at catchweight. Each fighter was fined 20% of their individual purses which went to their opponents Mike Davis, Josiane Nunes, and Joshua Culibao respectively.

Bonus awards
The following fighters received $50,000 bonuses.
 * Fight of the Night: No bonus awarded.
 * Performance of the Night: Marcin Tybura, Macy Chiasson, Jafel Filho, and Jaqueline Amorim