TLDR
- Kana Morimoto faces Selina Flores in atomweight Muay Thai at ONE Fight Night 50 on December 18 in Bangkok
- Morimoto switches from kickboxing to Muay Thai after posting a 3-3 ONE kickboxing record including wins over Stamp Fairtex
- Flores returns from a split-decision loss to Stamp Fairtex in September with a 1-1 ONE record
- Diogo Reis defends his ONE Flyweight Submission Grappling title against Brazilian newcomer Bebeto Oliveira
- The event serves as ONE Championship’s final U.S. primetime card of 2026, airing on Prime Video
Sources: middleeasy.com | onefc.com
ONE Championship announced two new fights for its final U.S. primetime event of 2026 on November 5. ONE Fight Night 50 takes place December 18 at Lumpinee Stadium in Bangkok, with coverage starting at 2 a.m. UTC on December 19.
Kana Morimoto will make her ONE Muay Thai debut against Selina Flores in an atomweight contest. The 34-year-old Japanese fighter has competed six times for ONE in kickboxing, posting a 3-3 record.
Morimoto most recently defeated Yu Yau Pui by unanimous decision at ONE Fight Night 46 in August. Her ONE kickboxing wins also include victories over Moa Carlsson and former three-sport champion Stamp Fairtex.
The former K-1 World Grand Prix winner held the K-1 flyweight championship for four years after winning the 2019 tournament. She now fights out of Team Aftermath.
VITÓRIA DELA! ♟️
Stamp Fairtex teve a paciência necessária, controlou a Selina Flores ao longo dos rounds e garantiu o triunfo para coroar o evento principal.
Assista o ONE Fight Night, ao vivo, na minha tela! 📺#ONENoCombate #ONEChampionship #MMA #StampFairtex #Combate pic.twitter.com/sMITvAHSzb
— Combate (@combate) September 5, 2026
Flores Returns After Close Loss to Stamp
Selina Flores enters the fight with a 1-1 ONE record, both fights in Muay Thai. The 28-year-old American won her debut against Marie McManamon by unanimous decision at ONE Fight Night 36 in October 2025.
In her second appearance, Flores pushed Stamp Fairtex through three full rounds before losing a split decision at ONE Fight Night 47 in September. Neither of her ONE fights ended in a stoppage.
ONE lists Flores as a multi-time WBC Muay Thai champion who arrived in the promotion on a four-fight winning streak. She stands 167 centimeters tall and has logged 18 minutes of competition time across her two ONE appearances.
The fight will follow ONE’s published Muay Thai rules, with athletes wearing four-ounce gloves. Non-championship bouts consist of three three-minute rounds with one-minute breaks between rounds.
Judges score each round using the ten-point-must system rather than judging the entire contest as one bout. Legal techniques include punches, kicks, knees, elbows, and throws.
Brazilian Title Fight Headlines December Card
The card also features an all-Brazilian submission grappling championship match. ONE Flyweight Submission Grappling World Champion Diogo Reis defends his title against Bebeto Oliveira.
Reis won the belt in his second promotional fight against Daiki Yonekura. The two-time ADCC World Champion earned ONE’s 2025 Submission Grappler of the Year honor and holds a 3-0 record in the organization.
Oliveira makes his promotional debut as a multi-time BJJ World Champion in both gi and no-gi competition. The 32-year-old has defeated IBJJF World Champions Edwin Ocasio, Paulo Miyao, and Thalison Soares.
Other announced fights include Kade Ruotolo versus Ok Rae Yoon in lightweight MMA and Maurice Abevi versus Dzhabir Dzhabrailov at welterweight. The Muay Thai portion also features Suablack Tor Pran49 against Jordan Estupinan and Bampara Kouyate against Ricardo Bravo.
The event airs on Prime Video for U.S. viewers and U-NEXT for Japanese audiences. ONE Fight Night 50 marks the promotion’s final U.S. primetime card of the 2026 calendar year.
