UFC Vegas 107's main event between Maycee Barber and Erin Blanchfield was canceled due to Barber's last-minute medical issue, reportedly a seizure, just six minutes before the scheduled walkout. Barber, who missed weight the day before, was unable to receive medical clearance. Blanchfield, already warmed up and prepared, expressed disappointment and ruled out a future fight with Barber. The card proceeded with other fights, leaving Barber's future uncertain and Blanchfield seeking a new opponent.

Prepared by Emily Rhodes and reviewed by editorial team.