A championship doubleheader will wrap up UFC International Fight Week in Las Vegas on July 6, as two pound-for-pound greats put their belts on the line against hungry contenders at UFC 239. In the main event, light heavyweight champion Jon "Bones"Jones hopes to extend his latest reign at the top when he battles Brazilian power striker Thiago “Marreta” Santos. In the co-main event, double champ Amanda Nunes moves back down to 135 pounds to defend her bantamweight crown against former world champion Holly Holm.