Usman skulle have mødt Santiago Ponzinibbio den 19. maj 2018 på UFC Fight Night 129. <ref name="ChileHeadliner">{{Kilde nyheder|url=https://www.mmafighting.com/2018/3/23/17158024/santiago-ponzinibbio-vs-kamaru-usman-scheduled-for-ufc-chile-main-event|title=Santiago Ponzinibbio vs. Kamaru Usman scheduled for UFC Chile main event|last=Ariel Helwani|date=2018-03-23|access-date=2018-03-23|publisher=mmafighting.com}}</ref> Den 21. april blev Ponzinibbio imidlertid trukket fra kortet på grund af en skade <ref>{{Kilde nyheder|url=http://mmajunkie.com/2018/04/ufc-chile-main-headliners-fall-apart-santiago-ponzinibbio-volkan-oezdemir-out|title=UFC Chile main, co-main events fall apart with Santiago Ponzinibbio, Volkan Oezdemir out|date=2018-04-22|work=MMAjunkie|access-date=2018-04-22|language=en-US}}</ref> og erstattet af Demian Maia . <ref>{{Kilde nyheder|url=https://sportv.globo.com/site/combate/noticia/ultimate-encaminha-demian-como-substituto-de-ponzinibbio-no-ufc-chile.ghtml|title=Ultimate announces Demian Maia as substitute for Ponzinibbio at UFC Chile|last=Raphael Marinho|date=2018-04-26|access-date=2018-04-26|publisher=sportv.globo.com|language=pt|archive-date=16. december 2019|archive-url=https://web.archive.org/web/20191216063200/https://sportv.globo.com/site/combate/noticia/ultimate-encaminha-demian-como-substituto-de-ponzinibbio-no-ufc-chile.ghtml|url-status=dead}}</ref> Usman vandt kampen via enstemmig afgørelse. <ref>{{Kilde nyheder|url=https://mmajunkie.com/2018/05/ufc-fight-night-129-results-kamaru-usman-denies-demian-maias-takedown-attempts-cruises-to-decision-win|title=UFC Fight Night 129 results: Kamaru Usman denies Demian Maia takedowns, cruises to decision win|date=2018-05-20|work=MMAjunkie|access-date=2018-05-20|language=en-US}}</ref>
Levende_personer Sport Kultur