Thailand’s legendary striker Sitthichai Sitsongpeenong is set to return to one of MuayThai’s most sacred battlegrounds when he faces Brazilian star Luis Cajaiba for the prestigious WBC MuayThai Super-welterweight Diamond Championship on June 30 at Rajadamnern Stadium in Bangkok.
The highly anticipated championship contest will bring together two internationally respected warriors in what promises to be a world-class showcase of elite MuayThai inside the famed and iconic Rajadamnern Stadium — Thailand’s first dedicated MuayThai venue and one of the sport’s most historic arenas.
Sitthichai enters the bout as one of the most accomplished fighters of his generation. Widely known around the world as “The Killer Kid,” the Thai superstar has built an extraordinary career spanning MuayThai and kickboxing, competing against many of the greatest names in modern combat sports. Among his many accolades are the Lumpinee Stadium championship and major victories on the global stage.
Born in Buriram, Thailand, Sitthichai began fighting at a young age and rose through the traditional Thai stadium system before becoming an international icon. Over the years he has competed in elite organizations across Asia, Europe, and the Middle East, earning a reputation for his devastating left kick, precision timing, and calm technical brilliance under pressure.
Standing across from him will be dangerous Brazilian challenger Luis Cajaiba, a battle-tested Nak Muay who has spent years competing at the highest levels in Thailand. Fighting out of Phuket Fight Club, Cajaiba has earned respect throughout the MuayThai world for his aggressive style, durability, and willingness to face elite opposition.
Cajaiba is a former WBC MuayThai World Welterweight Champion and former WBC MuayThai International Super-welterweight Champion. Throughout his career he has competed on major promotions including Rajadamnern World Series and Lumpinee Stadium events, facing many of Thailand’s top fighters.
The Brazilian challenger is no stranger to high-profile championship contests and has previously competed for the WBC MuayThai Diamond Championship, making this upcoming clash another major opportunity to cement his place amongst the sport’s elite.
With the WBC MuayThai Diamond Championship regarded as one of the organization’s most prestigious honors, fans can expect a spectacular contest between two world-class athletes representing two proud MuayThai nations.
On June 30, beneath the lights of Rajadamnern Stadium in Bangkok, Sitthichai Sitsongpeenong and Luis Cajaiba will battle for diamond glory in what promises to be one of the standout MuayThai events of 2026.