As he continues his journey in the martial arts world, whether through fighting or coaching, Wielzen remains a respected figure in Muay Thai, carrying his legacy as a champion and an ambassador of the sport.
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Sergio Wielzen: Bio
The Rise of “Samurai” in Muay Thai Kickboxing
Born on November 1, 1987, in Suriname, Sergio Wielzen moved to the Netherlands where he first encountered the world of Muay Thai.3
His interest in martial arts turned into a lifelong pursuit, leading him to train and develop his skills in the vibrant Muay Thai scene of the Netherlands.
Known for his tenacity and raw talent, Wielzen began his competitive career at the C-Class level, an entry-level in Dutch Muay Thai, and quickly progressed through the ranks, surprising opponents with his explosive power and adaptability.
Sergio’s fighting style earned him the nickname “Samurai” due to his precise, tactical approach combined with formidable strength.
Despite his relatively small stature, he has a reputation for delivering powerful strikes, often ending fights with knockouts.
His well-rounded skill set, which includes rapid hand speed, devastating kicks, and a strong clinch game, helped him stand out in the lightweight category, setting the stage for a memorable career.
Building Momentum: Early Victories and Rivalries
- In 2007, Sergio had a defining fight against Mohammed “Mootje” Kamal, another rising star in Muay Thai.
- Their first encounter was a B-Class match, which Wielzen won by decision, establishing his reputation as a serious competitor.
- This rivalry escalated as they met again a year later, with both fighters at the A-Class level.
- While Wielzen lost in a TKO decision in the fourth round, this fight demonstrated his resilience and ability to face high-caliber opponents.
- Despite the loss, he gained respect and solidified his position in the Muay Thai circuit.
- In 2010, Sergio Wielzen’s career took a significant leap when he faced Anuwat Kaewsamrit, a celebrated Thai fighter with a storied career.
- As the underdog, Wielzen defied expectations by delivering a brutal head kick that knocked out Kaewsamrit within the first 30 seconds of the fight.
- This victory sent shockwaves through the Muay Thai community and earned him recognition as a formidable lightweight fighter on the international stage.
Sergio Wielzen: Career
It’s Showtime 61MAX Title
After his victory over Kaewsamrit, Sergio continued to gain momentum, winning the U.M.C. Contender title against Imed Boukouayel and joining the esteemed It’s Showtime organization.
His first match with It’s Showtime took place in Milan, where he defeated local fighter Matteo Lippi by knockout.
Later that year, he was invited to compete for the inaugural It’s Showtime 61MAX world title against Mikael Peynaud. In a controversial decision due to a clash of heads that left Peynaud injured, Sergio won via technical decision, becoming the first-ever It’s Showtime 61MAX world champion.
Defending the Title and Facing Challenges
Sergio successfully defended his 61MAX title in Athens, Greece, against Japanese fighter Masahiro Yamamoto. In a dominant performance, Wielzen won by TKO, proving his skill and adaptability against international competition.
However, in March 2011, his title reign came to an end when he lost a majority decision to Karim Bennoui in Brussels. Despite this setback, Wielzen’s reputation remained intact, and he continued to compete at a high level.
Sergio’s career saw him competing worldwide, including bouts in Brazil, Austria, Russia, Italy, and Japan. Although he faced mixed results, his performances were marked by a consistent display of power and skill.
Notably, in 2012, he achieved a first-round knockout against Saša Jovanović at Vendetta VI in Vienna, Austria. In 2013, he continued to impress with a knockout win over Alexei Blinov in Cheboksary, Russia.
Setbacks and Learning Moments
- Not every match in Sergio’s career went in his favor. His bout against former Lumpinee Stadium champion Kaoponlek at Glory 7 in Milan, Italy, ended in a unanimous decision loss after he was knocked down in the first round.
- He also faced a high kick knockout loss to Masahiro Yamamoto during their rematch at RISE 94 in Tokyo.
- Despite these losses, Wielzen gained invaluable experience facing elite fighters and continued to refine his approach and resilience.
- In October 2013, Sergio entered the -65 kg Thai Max tournament in France.
- He began the event with a stunning first-round knockout of Mickael Peynaud in the quarterfinals but was defeated by Houcine Bennoui in the semifinals.
- Although he did not win the tournament, his performance added to his legacy and showcased his ability to compete at an international level against top talent.
Sergio Wielzen: Training and Transition to Sityodtong Muay Thai
In 2015, Sergio made a pivotal career decision by switching from Black Label and FF Carbin to Sityodtong Muay Thai & Kickboxing in Amsterdam.
Under the tutelage of trainers Paul and Vincent Pengel, he refined his technique and evolved his fighting style. This move to Sityodtong, a globally renowned Muay Thai academy, offered him new insights into training methods and an enhanced strategic approach.
The Lion Fight Championship and Current Legacy
Sergio continued to fight and, over time, claimed the Lion Fight Muay Thai world lightweight championship, adding another prestigious title to his career achievements.
Competing in organizations like Lion Fight allowed Wielzen to showcase his talents to audiences outside Europe and reinforce his reputation as a world-class Muay Thai fighter.
Throughout his career, Sergio Wielzen has earned respect for his ability to face formidable opponents, his relentless fighting style, and his knockout power.
Known as “Samurai,” he brought an indomitable spirit to the ring, always prepared to face a challenge regardless of his opponent’s reputation. His career is a testament to the dedication required to succeed in Muay Thai and the impact a determined fighter can have on the sport.
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