Discover the top 5 fighters in World Grand Prix Championships in 2025. From powerful kickboxing champions to rising stars in MMA and Muay Thai, learn about their achievements, fighting styles, and how they secured their place among the world’s elite. Stay updated with the latest rankings and highlights!
Roman Kryklia
- Weight Limit : 231.7 LBS / 105.1 KG
- Height : 6’6″ FT / 200 CM
- Team :Champ Belts
- Country :
- Light Heavyweight Kickboxing & Heavyweight Muay Thai World Champion
- Heavyweight Kickboxing World Grand Prix Champion
Roman Kryklia, the reigning ONE Light Heavyweight Kickboxing World Champion and ONE Heavyweight Muay Thai World Champion, began his martial arts journey at the age of six.
Raised in Krasnograd, eastern Ukraine, Kryklia trained in karate for over ten years before expanding his skills to include boxing, kickboxing, and Muay Thai. Throughout his youth and university years, he consistently won championships in karate and kickboxing at every level.
With more than 50 professional fights across Europe and Asia, Kryklia has earned numerous prestigious titles, including the KLF Heavyweight Kickboxing World Championship. Known for his exceptional endurance, he has triumphed in multiple one-night tournaments, using his rare combination of height, reach, and speed to secure knockouts in over half of his victories.
Recognized as one of the top fighters worldwide in recent years, Kryklia reached new heights by winning the first-ever ONE Light Heavyweight Kickboxing World Championship in November 2019, followed by the inaugural ONE Heavyweight Muay Thai World Title in December 2023.
As a dominant force in two disciplines, he has successfully defended his light heavyweight kickboxing title twice and added a silver medal to his collection by winning the 2022 ONE Heavyweight Kickboxing World Grand Prix Championship.
Christian “The Warrior” Lee
- Weight Limit : 170.4 LBS / 77.3 KG
- Height : 5’10” FT / 180 CM
- Team :Evolve MMA / United MMA
- Country : Singapore/US
- Lightweight MMA & Welterweight MMA World Champion
- Lightweight World Grand Prix Champion
Christian “The Warrior” Lee, the reigning two-division ONE MMA World Champion, hails from a family deeply rooted in martial arts. Both of his parents hold black belts in multiple disciplines, laying the foundation for Christian and his siblings to rise through the ranks of ONE Championship.
His sister, Angela Lee, a former ONE Women’s Atomweight MMA World Champion, made history before her retirement in 2023. Meanwhile, his younger brother, Adrian Lee, is seen as a rising star and potential future champion in the organization.
Christian’s talent was evident early on. As a teenager, he earned black belts in both Brazilian Jiu-Jitsu and the Total Defense System. In 2013, he was named Most Outstanding Athlete at the FILA World Championship after capturing six world titles in BJJ, pankration, MMA, and submission grappling.
Since turning professional in 2015, Lee has become known as ONE’s most prolific finisher, thrilling fans with his aggressive style and elite-level skill set. His breakout moment came in 2019 when he knocked out Shinya Aoki to become the youngest male MMA World Champion in ONE history, joining Angela as part of the sport’s only sibling world champion duo.
Christian Lee made more history in 2022, capturing the ONE Welterweight MMA World Title with a dramatic knockout of Kiamrian Abbasov, securing his legacy as a dominant force across two weight classes in the sport.
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Demetrious “Mighty Mouse” Johnson
- Weight Limit : 133.8 LBS / 60.7 KG
- Height : 5’2″ FT / 160 CM
- Team :AMC Pankration / Evolve MMA
- Country : US
- Flyweight World Grand Prix Champion
Demetrious “Mighty Mouse” Johnson, a 14-time Flyweight World Champion, is widely regarded as one of the greatest pound-for-pound mixed martial artists in history. After a record-breaking reign in North America, where he defended the UFC Flyweight World Title 11 consecutive times, Johnson made a groundbreaking move to ONE Championship in 2018.
His journey to greatness was fueled by determination and resilience. Raised by his hearing-impaired mother and an abusive stepfather, Johnson faced immense challenges growing up. Yet he excelled as an athlete in high school, eventually placing second at the Washington State Wrestling Championships, a result that launched his path into MMA.
Johnson began his professional MMA career in 2007 and initially competed at bantamweight before finding his stride in the flyweight division. In 2012, he claimed the UFC Flyweight World Title and went on to dominate the division, setting an unmatched record for title defenses.
In ONE Championship, “Mighty Mouse” continued to impress, defeating Yuya Wakamatsu, Tatsumitsu Wada, and Danny Kingad to win the 2019 ONE Flyweight World Grand Prix Championship. That victory earned him a title shot against Adriano Moraes in 2021. In a shocking upset, Johnson suffered the first knockout loss of his 15-year career.
He rebounded in spectacular fashion. In March 2022, Johnson defeated Muay Thai superstar Rodtang Jitmuangnon in a unique special rules bout. Then in August, he avenged his loss to Moraes by knocking him out with a knee at ONE on Prime Video 1 to claim the ONE Flyweight World Title.
Johnson cemented his legacy further in 2023 with a unanimous decision win over Moraes in their trilogy bout at ONE Fight Night 10 in the U.S., capturing his 14th MMA World Title and solidifying his place as the greatest of all time.
Stamp Fairtex
- Weight Limit : 115.1 LBS / 52.2 KG
- Height : 5’1″ FT / 157 CM
- Team :Fairtex Training Center
- Country : Thailand
- Atomweight MMA World Grand Prix Champion
Stamp Fairtex, a former three-sport ONE World Champion, has been passionate about Muay Thai since she was just five years old. Inspired to learn the sport at her father’s gym to defend herself from bullies, she began training at a young age and entered her first professional fight just a year later—winning by knockout in under 30 seconds.
Over the years, Stamp built an impressive Muay Thai record, competing in over 80 bouts and earning accolades including stadium titles and becoming a two-division Northeastern Thailand Champion. Hailing from a humble farming background in Rayong province, she moved alone to Pattaya at 18 to chase her dream of becoming a professional combat sports athlete—a move that ultimately paid off.
Stamp burst onto the global scene in her ONE Championship debut by capturing the ONE Atomweight Kickboxing World Title. She quickly followed that up by winning the ONE Atomweight Muay Thai World Title, making history as the promotion’s first-ever two-sport World Champion.
Not one to be confined to striking, Stamp transitioned to mixed martial arts and, in 2021, claimed the ONE Women’s Atomweight World Grand Prix Championship, earning a shot at reigning queen Angela Lee. Though she fell short in that title bout, she remained undeterred.
Stamp continued her MMA journey, racking up key wins before making history once again by finishing veteran Ham Seo Hee at ONE Fight Night 14 to capture the ONE Women’s Atomweight MMA World Title. With that victory, she became the first athlete in ONE history to win world titles in three different sports—Muay Thai, kickboxing, and MMA.
Unfortunately, while preparing for her first MMA World Title defense in 2024, Stamp suffered an injury that hindered her recovery. As a result, she was forced to vacate the belt in May 2025, pausing her reign but not her legacy as one of the most versatile and accomplished fighters in combat sports.
Giorgio “The Doctor” Petrosyan
- Weight Limit : 155 LBS / 70.3 KG
- Height : 5’10” FT / 178 CM
- Team :Team Multi Fight Petrosyan
- Country : Italy
- Featherweight Kickboxing World Grand Prix Champion
Giorgio “The Doctor” Petrosyan is widely regarded as one of the most accomplished and dominant kickboxers in history. A multiple-time Kickboxing World Champion, his remarkable career includes two K-1 World MAX titles, a Glory Slam Tournament Championship, and several other prestigious accolades that have solidified his legacy in the sport.
But Petrosyan’s rise to greatness almost never happened. Born in Armenia, he and his family were forced to flee their homeland in 1999 due to conflict and instability. They resettled in Italy with virtually nothing, facing extreme hardship—including sleeping in train stations—before being rescued by a humanitarian organization that helped them rebuild their lives.
Inspired by martial arts legends like Jean-Claude Van Damme and Bruce Lee, Petrosyan began kickboxing as a teenager and quickly discovered his calling. Driven by passion and relentless dedication, he trained tirelessly and soon became a force in the striking world.
Petrosyan’s precision, timing, and defensive mastery earned him the nickname “The Doctor,” and his dominance in the ring led to an extraordinary 42-fight unbeaten streak that lasted six years—a feat nearly unheard of at the elite level of kickboxing.
In October 2019, he added another historic achievement to his résumé by conquering the most stacked tournament in kickboxing history: the ONE Featherweight Kickboxing World Grand Prix. Petrosyan defeated three top-tier World Champions en route to victory, further cementing his status as one of the greatest strikers the sport has ever seen.
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