"I need to pull out of the Atomweight WGP due to a high fever (non-covid)," wrote Hirata.

"I fought hard to be in the semifinals. It is regretful that I have to pull out at this stage and disappoint many people. I will recover and be back in ONE Circle [sic] as soon as possible. Thank you."

Stepping in for Hirata will be Jenelyn Olsim, who is coming off an exciting victory over Bi Nguyen.

The originally scheduled ONE Heavyweight Kickboxing World Championship main event is also off the card as Roman Kryklia stepped down with an undisclosed medical condition.

Iraj Azizpour remains on the card and will battle Anderson "Braddock" Silva in a non-main event contest. The debuting Iranian will still get a global platform to showcase his skills and affirm his spot as a top contender for the inaugural ONE Heavyweight Kickboxing World Title.

The new main event will be the ONE Atomweight World Grand Prix matchup between Stamp Fairtex and Julie Mezabarba.

ONE: NextGen airs across Bleacher Report platforms on Friday, October 29, at 8:30 a.m. EST/5:30 a.m. PST.

ONE: NextGen Full Card

Stamp Fairtex vs. Julie Mezabarba

Ritu Phogat vs. Jenelyn Olsim

Iraj Azizpour vs. Anderson Silva

Kirill Grishenko vs. Dustin Joynson

Miao Li Tao vs. Jeremy Miado

Beybulat Isaev vs. Bogdan Stoica

Jenelyn Olsim vs. Maira Mazar | Full Fight Replay