Superlek Kiatmuu9

Manachai Yamsiri, known professionally as Superlek Kiatmuu9, is a Thai professional Muay Thai fighter and kickboxer. Nicknamed 'The Kicking Machine', he is regarded as one of the greatest Muay Thai fighters of his generation.
In 2011, he won the Thailand Mini-Flyweight title. The following year, he won the vacant Thailand Flyweight title and the vacant Lumpinee Stadium Super Flyweight title. In 2013, he won the Lumpinee Stadium Bantamweight title and the Thailand Featherweight title. In 2016, he won the WBC MuayThai Super Featherweight World title. In 2022, he won the vacant True4U Super Lightweight title and made his ONE Championship debut. In 2023, he won the vacant ONE Flyweight Kickboxing World title when he beat Spanish fighter Daniel Puertas Gallardo. In 2024, he won the ONE Bantamweight Muay Thai World title when he beat Jonathan Haggerty of Britain by knockout in the first round.
A technical Muay Fimeu stylist, Yamsiri is known for his striking skills which is characterised by fast kicks and knees. In 2012, he was awarded Sports Authority of Thailand Muay Thai Fighter of the Year. As of October 2024, he is #1 in Combat Press' men's pound-for-pound rankings for Muay Thai and #6 in Beyond Kick's men's pound-for-pound rankings for kickboxing.

Muay Thai career

ONE Championship

On 16 February 2019, Superlek made his ONE Championship debut against Lao Chetra at ONE Championship: Clash of Legends. By unanimous decision, Superlek Kiatmoo9 defeated Lao Chetra.
Superlek returned to ONE Championship on 10 May 2019 at ONE Championship: Warriors of Light. Facing Rui Botelho, Superlek won the fight by unanimous decision.
On 31 July 2020, Superlek faced Panpayak Jitmuangnon at ONE Championship: No Surrender for a seventh time. He won the fight by a unanimous decision to improve to 2–4–1 against Panpayak all-time.
Superlek was scheduled to fight Fahdi Khaled during ONE Championship: A New Breed 2 on 21 August 2020. He defeated Khaled by a unanimous decision.
Superlek is scheduled to challenge Ilias Ennahachi for the ONE Flyweight Kickboxing World Championship at ONE Championship: Fists Of Fury on 26 February 2021. He lost by a controversial unanimous decision.
Due to the highly controversial nature of the decision, ONE CEO Chatri Sityodtong announced an immediate title rematch between Superlek and Ennahachi.
Superlek was booked to face Tagir Khalilov at ONE: Lights Out on 11 March 2022. However, the bout was scrapped.

ONE Muay Thai Flyweight Grand Prix

Superlek was scheduled to face former Shoot boxing and RISE champion Taiki Naito in the ONE Muay Thai Flyweight Grand Prix quarterfinal at ONE 157 on 20 May 2022. He won by unanimous decision.
Superlek faced Walter Goncalves in the quarterfinals of the ONE Muay Thai Flyweight Grand Prix at ONE on Prime Video 1 on 27 August 2022. He won after knocking out Goncalves with an elbow in the first round.
Superlek was scheduled to face Panpayak Jitmuangnon in the ONE Flyweight Muay Thai World Grand Prix Tournament final bout on 22 October 2022, at ONE on Prime Video 3. However, Superlek withdrawn from the event due to training injuries. The pair was rescheduled to meet at ONE 164 on 3 December 2022. At weigh-ins, the pair failed to make weight in the flyweight division and disqualified from the tournament, agreed to compete in the 138 lbs catchweight. He won the fight by split decision.

ONE Flyweight Kickboxing World Champion

The rematch between Superlek and Ilias Ennahachi was scheduled on 14 January 2022, at ONE on Prime Video 6. However, Ennahachi pulled out due to his inability to make the flyweight limit of 135 pounds while hydrated, and he vacated the title. Therefore, Superlek instead faced Daniel Puertas for the vacant championship. He won the fight via unanimous decision, which earned him the title.
Superlek was scheduled to make his first ONE Flyweight Kickboxing World Championship against the ONE Flyweight Muay Thai World champion Rodtang Jitmuangnon at ONE Fight Night 8 on 25 March 2023. However, Rodtang withdraw from the bout due to injury and was replaced by Danial Williams. He won the bout via knockout in the third round.
Superlek faced the two-division WBC Muaythai champion Nabil Anane at ONE Friday Fights 22 on 23 June 2023. He won the bout in the first round, defeating Anane via body punch KO.
Superlek faced Tagir Khalilov in the main event of ONE Fight Night 12 on 15 July 2023. At the weigh-ins, Superlek missed weight, weighing in at 135.25 lbs, 0.25 pounds over the limit. The bout proceeded at catchweight with Superlek being fined a portion of his purse, which went to Tagir Khalilov. He won the fight by second-round technical knockout.
On 22 September 2023, Superlek won a decision over ONE Flyweight Muay Thai World champion Rodtang Jitmuangnon, which had been a scheduled title defense for Rodtang, but Superlek again missed weight so Rodtang's title was not on the line
Superlek was scheduled to defend the ONE Flyweight Kickboxing World Championship against Elias Mahmoudi at ONE Fight Night 18 on 13 January 2024. However, Mahmoudi withdrew from the bout due to rib injury. Superlek was instead to face Takeru Segawa, who was originally set to face Rodtang Jitmuangnon, at ONE 165 on 28 January 2024. He won the fight by unanimous decision.

ONE Bantamweight Muay Thai World Champion

Superlek challenged Jonathan Haggerty for the ONE Bantamweight Muay Thai World Championship at ONE 168 on 6 September 2024. He knocked Haggerty out with an elbow just 49 seconds into the fight, becoming the new champion. Superlek was awarded Performance of the Night honors for this victory.
In the first title defense a bantamweight title, Superlek was scheduled to face Nico Carrillo on 24 January 2025, at ONE 170. However, Superlek withdrew from the bout and was replaced by Nabil Anane for the interim championship.
The rematch between Superlek and Anane in a unification of ONE Bantamweight Muay Thai World Championship took place at ONE 172 on 23 March 2025. At the weigh-ins, Superlek failed the hydration test and came in at 146.25 pounds, 1.25 pounds over the bantamweight limit. As a results, Superlek was stripped of the title and the bout was switched to three-round non-title bout. He lost the fight via unanimous decision.
Superlek faced Yuki Yoza at ONE 173 on November 16, 2025.

Personal life

Yamsiri is the nephew of Singdam Kiatmuu9, a former four-time Lumpinee Stadium champion, and also grew up with the current Glory Featherweight Champion, Petpanomrung Kiatmuu9.

Titles and accomplishments

ONE Championship
* 2023 ONE Flyweight Kickboxing World Champion
* 2024 ONE Bantamweight Muay Thai World Champion
*Performance of the Night vs. Danial Williams, Walter Goncalves, Nabil Anane, Takeru Segawa and Jonathan Haggerty
* Longest current win streak in ONE Championship
* 2024: Fighter of the Year
* 2024: Fight of the Year
* 2024: Knockout of the Year
Petchyindee True4U
* 2022 True4U Light Welterweight Champion
Muay Thai Nai Khanom Tom Association
* 2018 Nai Khanom Tom Champion
World Boxing Council Muaythai
* 2016 WBC Super Featherweight World Champion
Professional Boxing Association of Thailand
* 2013 Thailand Featherweight Champion
* 2012 Thailand Flyweight Champion
* 2011 Thailand Mini Flyweight Champion
Lumpinee Stadium
* 2013 Lumpinee Stadium Bantamweight Champion
* 2012 Lumpinee Stadium Super Flyweight Champion
Awards
* 2012 Sports Authority of Thailand Muay Thai Fighter of the Year
* 2024 Combat Press Fighter of the Year
Fight record