A major upset in the women’s bantamweight division is the focus of this week’s USA TODAY Sports/MMA Junkie rankings. On Saturday at UFC 269 , Julianna Pena pulled off one of the greatest upsets of all time by submitting Amanda Nunes to claim the bantamweight title. As a result, her ranking shot to the top of the list. Also, with the UFC lightweight title on the line in the main event of the final pay-per-view of 2021, Charles Oliveira recorded his first title defense by finishing Dustin Poirier , solidifying his position atop the 155-pound division