​ONE Championship has completed the bracket for its blockbuster eight-man ONE SAMURAI Featherweight Kickboxing Tournament, revealing the final two matchups that will determine who earns a shot at gold.Three-time Glory Kickboxing World Champion Marat Grigorian will square off against Russian standout Mamuka Usubyan at The Inner Circle 25 on Friday, August 7. The bout streams live in Asia primetime via live.onefc.com from Bangkok’s iconic Lumpinee Stadium.The very next night, Japan’s Kosuke “Unstoppable Phoenix” Takagi collides with China’s Luo Chao at ONE SAMURAI 2 on Saturday, August 8, live from the iconic EBARA WAVE Arena Ota. The winner of the tournament will earn a guaranteed shot at reigning ONE Featherweight Kickboxing World Champion Superbon.AdvertisementAdvertisementAdvertisementIn two previously announced bouts, former ONE Interim Featherweight Kickboxing World Champion Masaaki Noiri will seek revenge against “Spirit Dragon” Liu Mengyang, while Japanese star Kaito Ono runs it back with Iranian powerhouse Mohammad Siasarani.Marat Grigorian appeared to place himself at the front of the featherweight kickboxing queue with his most recent performance. The Armenian icon needed less than two minutes to knock out Kaito at ONE SAMURAI 1 on April 29, ending their heated rivalry with a decisive statement inside Tokyo’s Ariake Arena.AdvertisementAdvertisementAdvertisementThe victory improved his record to 70-14 and delivered the fastest knockout of his ONE Championship tenure. It also extended Grigorian’s winning streak to three.The Hemmers Gym representative began his current surge by stopping Abdelali “Black Diamond” Zahidi in the second round at ONE Friday Fights 92. He then outworked former K-1 Champion Rukiya “Demolition Man” Anpo across three hard rounds at ONE 173 before dismantling Kaito.The decorated veteran will now enter a tournament filled with the division’s finest talent and attempt to make his next title opportunity undeniable.Grigorian has already shared the ring with Superbon three times across their careers. He famously knocked out the Thai superstar in only 29 seconds outside ONE in 2018. But their two meetings inside the promotion both ended with Superbon earning decision victories.AdvertisementAdvertisementAdvertisementThe ONE SAMURAI tournament now offers Grigorian a definitive path toward another chapter in that rivalry and another chance to claim the major prize still missing from his decorated resume. But his opening assignment is far from a formality.Mamuka Usubyan has built a flawless promotional record and now receives the biggest opportunity of his ONE run. The Armenia-born Russian most recently defeated Enzo Kartoum via unanimous decision in the co-main event of ONE Friday Fights 158 on June 12.His volume and precision earned him the victory on all three scorecards, extending his perfect ONE record to 4-0 and improving his professional slate to 24-2.AdvertisementAdvertisementAdvertisementThat