Stamp Fairtex Completes Two-Year Injury Rehab with Muay Thai Return in Bangkok

Stamp Fairtex, the only three-sport world champion in the history of ONE Championship, is set to make her highly anticipated return to Muay Thai competition on Friday, June 26, 2026. Facing Mexican striker Cynthia Flores at The Inner Circle 20 inside Bangkok’s historic Lumpinee Stadium, the bout marks the culmination of a grueling two-year injury rehabilitation. For the 28-year-old Thai megastar, the fight is more than a nostalgic return to her roots; it is a critical stress test for a surgically repaired knee that nearly ended her historic career.[1][3][4]

The ordeal began in May 2024, when Stamp suffered a severe torn meniscus during training. The injury required immediate surgery and launched an arduous recovery process that tested her physical and mental resilience. For an athlete who began competing in "the art of eight limbs" at age five, the sudden inability to train at an elite level was devastating. Every explosive movement during her initial rehab raised questions about whether her knee would ever hold up to the rigors of world-class combat sports.[4]

The situation worsened in early 2025 when Stamp suffered a setback in her recovery. Unable to defend her ONE Women's Atomweight MMA World Title in a timely manner, she made the agonizing decision to relinquish the belt in May 2025. The title was subsequently awarded to interim champion Denice Zamboanga, leaving Stamp without the mixed martial arts crown she had fought so hard to win in 2023.[5]

Stamp's prolonged absence sent shockwaves through ONE Championship's promotional calendar. The organization had heavily marketed her as the centerpiece of their highly anticipated return to the United States. Without their marquee champion available for the August 2025 card at Ball Arena in Denver, Colorado, ONE executives were forced to postpone the entire event to June 2026, underscoring Stamp's immense value to the promotion's global expansion.[5]

Now fully healed, Stamp is taking a calculated approach to her comeback. Rather than diving straight back into the grueling grappling and wrestling exchanges of mixed martial arts, she has chosen to rebuild her cardiovascular endurance through striking. Friday's bout will be her first time competing under Muay Thai rules in six years, a return to the discipline where she first made her name.[1][2][4]

"Accepting a Muay Thai fight after six years away feels amazing," Stamp noted during fight week in Bangkok. "It feels like I'm finally returning to my roots, returning to the sport I've been competing in since I was a kid. It feels great, and it actually gives me a lot more confidence than competing in kickboxing."[1][3]

Stamp previously tested her knee late last year in a kickboxing bout against Japanese standout Kana Morimoto at ONE 173. Although Stamp lost the three-round contest on the judges' scorecards, she viewed the performance as a vital diagnostic tool. The bout successfully shook off her ring rust and proved her knee was structurally sound, while also exposing that her cardiovascular conditioning—her "gas tank"—needed significant work before she could endure a five-round MMA championship fight.[1][2][4]

Standing across from her on Friday will be Cynthia Flores, a 31-year-old Mexican fighter representing Phuket Fight Club. Boasting a 25-7 professional record, Flores is known for her relentless forward pressure and heavy hands. She presents a highly dangerous test for a fighter still regaining her elite rhythm, as her aggressive boxing style is designed to punish any momentary lapses in concentration.[1][3]

Adding a layer of tactical intrigue to the matchup, Flores has conducted her training camp alongside reigning ONE Women's Atomweight Muay Thai World Champion Allycia Hellen Rodrigues. Rodrigues is the very fighter who defeated Stamp for the Muay Thai belt in August 2020, meaning Flores will enter the ring armed with strategic insights from the woman who previously dethroned the Thai superstar.[1]

Stamp is acutely aware of the threat Flores poses and has tailored her game plan accordingly. Anticipating heavy boxing combinations and constant forward motion, Stamp intends to utilize Thailand's signature close-quarters weapons. "Since she's a puncher, she's going to rely heavily on her hands," Stamp explained to reporters. "When someone comes in with punches, the shortest weapon to counter them is the elbow."[2][3]

While Friday's atomweight clash is strictly a striking affair, Stamp's long-term roadmap remains firmly fixed on the MMA cage. She views the Flores bout as the final preparatory step to rebuild her lung capacity and timing. Once she is satisfied with her conditioning, the former champion intends to pivot back to the sport that currently dominates her ambitions.[1][2][4]

"Yes, the plan is likely going to be MMA toward the end of the year," Stamp confirmed, putting the atomweight division on notice. "They are completely healed. Finally, they are healed. Ready. I am ready." If her knee holds up to the relentless pressure of Cynthia Flores, the combat sports world can expect to see Stamp Fairtex challenging for her lost MMA crown before the close of 2026.[2]