[3] Background This event features title fight for the ONE Strawweight Championship between the champion Joshua Pacio and the top contender Yosuke Saruta as ONE: Eternal Glory headliner.

[4] Hayato Suzuki was to challenge Joshua Pacio for the strawweight title at this event, but had to withdraw due to an injury.

[9] This card also featured the first bout in the ONE Championship Lightweight World Grand Prix Tournament between the American Lowen Tynanes and Honorio Banario.

This event features a title fight between Nong-O Gaiyanghadao and Han Zi Hao for the inaugural ONE Muay Thai Bantamweight Championship as ONE: Clash of Legends headliner.

This event features a title fight between the ONE Kickboxing Women's Atomweight Championship Stamp Fairtex and American Muay Thai champion Janet Todd for the inaugural ONE Muay Thai Atomweight Championship as ONE: Call to Greatness headliner.

In turn, promotion officials rescheduled the pairing for ONE Championship: Reign of Valor event March 9, 2019 in Yangon, Myanmar.

This event features a title fight between the champion Zebaztian Kadestam and Georgiy Kichigin for ONE Welterweight Championship as ONE: Reign of Valor headliner.

The ONE Lightweight GP semi final bout between Ariel Sexton and Saygid Guseyn Arslanaliev was expected for ONE Championship: Enter the Dragon.

This event features a title fight between the champion Stamp Fairtex and Alma Juniku for ONE Muay Thai Women's Atomweight Championship as ONE: Legendary Quest headliner.

This event featured the Grand-Prix Quarter-finals rematch between Giorgio Petrosyan and Phetmorakot Petchyindee Academy as ONE: Masters Of Destiny headliner.

The Flyweight Grand-Prix Semi-finals bout between Danny Kingad and Kairat Akhmetov was expected for the ONE Championship: Dawn Of Heroes main card.

Wakamatsu instead faced the former ONE Flyweight World Champion Geje Eustaquio, who stepped in on short notice for this encounter.

Mauro Cerilli has been forced to withdraw from his scheduled fight against Arjan Bhullar due to undisclosed reasons.

Former ONE bantamweight title challenger Dae Hwan Kim served as Kamikubo replacement, takes short notice fight against Saadulaev.

Rafi Bohic has been forced to withdraw from his scheduled co main event bout against Saemapetch Fairtex due to an injury, Azize Hlali has stepped in as a replacement.

Thanonchai SomawangGaiyang has been forced to withdraw from his scheduled fight against Kohei Kodera due to undisclosed reasons.

Kodera instead faced the Lumpinee Muay Thai World Champion Singtongnoi Por Telakun, who stepped in on short notice for this encounter.

A featherweight bout between Thanh Tung Nguyen and Shahzaib Rindh was previously scheduled for ONE: Immortal Triumph.

ONE Warrior Series 8 was a Combat sport event held by ONE Championship on October 5, 2019, at the Bellesalle Shibuya Garden in Tokyo, Japan.

Emilio Urrutia has been forced to withdraw from his scheduled fight against Jae Woong Kim due to undisclosed reasons.

Sasha Moisa has been forced to withdraw from his scheduled fight against Yodsanklai Fairtex due to undisclosed reasons.

[22] Cindy Tiong has been forced to withdraw from his scheduled fight against Ritu Phogat due to undisclosed reasons.