Danielle Kelly, 26, of Philadelphia, Pennsylvania, United States is one of the three American athletes on the fight card of the ONE Championship event “ONE: X“. She is set to fight Mei “V.V.” Yamaguchi, 39, of Tokyo, Japan.
On November 24, 2017, Yamaguchi defeated Gina “Conviction” Iniong, 32, of Baguio City, Philippines. The latter trains at Team Lakay in La Trinidad, Benguet, Philippines, which is around 10km away from Baguio City.

“ONE: X” in Singapore
Featuring 11 mixed martial arts fights, three Muay Thai matches, three kickboxing contests, two submission grappling contests and one hybrid MMA-Muay Thai fight, “ONE: X” will be held at the Singapore Indoor Stadium in Kallang, Singapore in three parts on March 26, 2022. The first part will start at 1:00 p.m.
One of the matches in the first part is a submission grappling between Kelly and Yamaguchi. They will battle it out in the atomweight division.
The second part will start at 5:00 p.m. The third part, which is the grand finale, will start at 8:00 p.m.
There are five Filipino athletes on the “ONE: X” fight card. Three of them are from Baguio City namely Eduard “Landslide” Folayang, 37, Lito “Thunder Kid” Adiwang, 29, and Stephen “The Sniper” Loman, 29.
Danielle Kelly vs Mei Yamaguchi
Kelly earned her Brazilian jiu-jitsu black belt under Karel “Silver Fox” Pravec in 2020. She started training at Evolve MMA in Singapore after signing with ONE Championship on February 18, 2022.
“ONE: X” marks Kelly’s ONE Championship debut. It also marks Yamaguchi’s first grappling match in the Singapore-based martial arts organization.
As an MMA fighter, Yamaguchi has been competing in ONE Championship since 2016. Here is a comparison between Kelly and Yamaguchi’s numbers:
DANIELLE KELLY | MEI YAMAGUCHI | |
age | 26 | 39 |
height | 5’7″ | 5’0″ |
pro fight debut | 2018 (grappling) | 2007 (MMA) |
pro fight record | 10 wins, 7 losses (grappling) | 21 wins, 14 losses, 1 draw (MMA) |
ONE Championship debut | 2022 | 2016 |
ONE Championship record | 0 win, 0 loss | 6 wins, 6 losses |