ONE Championship middleweight world champion Vitaly Bigdash is out of ONE: AAscent to Power in Singapore on 6 May after suffering an injury during training.
The co-main event will now see Roger Gracie face Michal Pasternak for the inaugural ONE light heavyweight world title.
In the main event, Singapore’s Angela Lee remains set to do battle with Japan’s Mei Yamaguchi for the inaugural ONE Women’s Atomweight World Championship.
“Unstoppable” Angela Lee of Waipahu, Hawaii, is one of the promotion’s most promising young prospects regardless of gender or weight class. Lee will challenge 33-year-old Japanese MMA veteran Mei “V.V” Yamaguchi for the first women’s title in Asia.
Former ONE Featherweight world champion Narantungalag Jadambaa of Mongolia makes his highly-anticipated return to the ONE cage since losing his title to current titleholder Marat “Cobra” Gafurov in an instant classic last November.
Jadambaa and Gafurov went back-and-forth for four gruelling rounds before Gafurov was able to unseat the former champion. Jadambaa is now on the comeback trail, but will Kotetsu “No Face” Boku.
Christian “The Warrior” Lee, younger brother of Angela Lee, has impressed in his first few outings in ONE Championship. Lee is riding the momentum of three stoppage wins inside the ONE Cage, two by highlight-reel knockout and the other by crafty submission. Lee looks to continue his early success but will face a stern test when he takes on the Philippines’ Cary Bullos.