The 27-year-old Angela Lee, who was the ONE atomweight champion, has not fought since October 2022. Her younger sister Victoria took her own life in December last year.\r\n\r\nLee walked out to cheers and applause, before placing her championship belt in the middle of the cage.\r\n\r\nShe talked about the many battles in and out of the ring and waved at fans.\r\n\r\nREAD:Matteo Berrettini Responds to Girlfriend Melissa Satta Hosting Ryder Cup 2023 Opening Ceremony\r\nAngela Lee\r\n\u201cI\u2019m here today to officially announce my retirement,\u201d Lee said. \u201cIt has been an incredible eight years. I just want to say thank you to the fans, to ONE Championship, to Chatri (Sityodtong), to my teams, and to just everyone. There have been so many battles in and out of the cage.\r\n\r\n\u201cThe last thing I want to Angela Lee say is this, to the fighters and to everyone out there watching right now. The greatest battle that we\u2019ll ever face won\u2019t be with an opponent standing in front of us.\r\n\r\n"The greatest battle will be within ourselves. We all go through struggles, but we all fight. Each day, we\u2019re victorious when we choose to rise up in the face of adversity. So thank you guys so much. I love you. Thank you.\u201d\r\n\r\nThailand's Stamp Fairtex, who stopped South Korean Ham Seo-hee in the third round of their bout to become ONE's new atomweight champion, embraced Lee after her victory.\r\n\r\n\u201cI love you so much,\u201d Stamp told Angela Lee. \u201cYou\u2019re my idol.\u201d The pair fought in March 2022, with Lee winning via submission.\r\n\r\nAfter stepping out of the cage, Angela Lee carried her two-year-old daughter Ava and was embraced by her husband Bruno Pucci before she left the arena. She leaves ONE with an 11-3 record.\r\n\r\nThe Singapore-based MMA promotion later posted on Instagram to congratulate Lee on a "legendary career", with fighters like Superbon Singha Mawynn, Abraao Amorim, and Ritu Phogat leaving tributes.\r\n\r\nLee fought under the Singapore and US flags and was ONE\u2019s youngest world champion at 19 when she claimed the inaugural women\u2019s Atomweight World Championship in May 2016.\r\n\r\nHer brother Christian Angela Lee and she have been on hiatus since their sister\u2019s death.\r\n\r\nWith her retirement, Angela Lee focus will turn to her budding non-profit organization Fightstory, which she set up in March this year.\r\n\r\nLast week, she revealed a car crash in 2017 was not an accident but a suicide attempt.\r\n\r\nIn an interview during her first trip back to Singapore since Victoria\u2019s death, she spoke openly about her own mental health struggles and paid tribute to her sister.