Sergej Maslobojev

Sergej Maslobojev is a Lithuanian mixed martial artist, boxer and kickboxer, currently signed with GLORY, where he is a former two time Glory Light Heavyweight champion. He is ranked as the best light heavyweight in the world by Combat Press.

Personal life

Maslobojev saw kickboxing when he was a child, but only started training at the age of 18. He was impressed by Mirko Filipović, Wanderlei Silva and Remigijus Morkevičius.
He is a professional Kickboxer and previously fought out of Sparta Fight gym in Lithuania, Vilnius city. In 2018 Sergej opened a brand new gym named Champion's House. He now has his own brand "Kuvalda Team". He regularly participates in various charity, being also a member of UNICEF. He undertakes training seminars for members of the Lithuanian Armed Forces.
Maslobojev calls himself "a huge Dragonball Z nerd."

Kickboxing career

Early career

Maslobojev made his professional debut against Steve Hooper in May 2007, when the two fought for the WKA Heavyweight Championship. The fight went into the tenth round, after which Sergej won by knockout. In his next fight, Maslobojev won the Baltic Muay Thai Light Heavyweight title, with a decision win over Kristaps Zile. After defeating Ricardo van den Bos, he entered the 2011 KOK European Heavyweight Grand Prix. He scored a first-round knockout of Vasile Popovici in the quarterfinal and a third-round knockout of Martynas Knyzelis in the semifinal, and faced Mindaugas Sakalauskas in the finals. Maslobojev beat Sakalauskas by knockout in the fifth round.
Maslobojev went on a 2–2 run over his next four fights, before challenging the reigning WKN Heavyweight champion Vladimir Mineev at Fight Nights: Battle of Moscow 15. Mineev won the fight by majority decision.

King of Kings

For his next fight, Maslbojev was scheduled to fight Lukasz Butkiewicz, at the KOK World GP 2014 in Gdańsk. He won the fight by a second-round knockout. He followed this up with a fight against Pavel Voronin, whom he beat by knockout as well. He would go on to win four of his next five fights, losing only to Roman Kryklia, before fighting Robert Dorin for the KOK Heavyweight Championship. Sergej won the fight by unanimous decision.
After winning the KOK title, Maslobojev went on an eight fight, two year winning streak, during which he earned decision wins over Gokhan Gedik, Oleg Pryimachov and Thomas Bridgewater, as well as stoppage wins over Antonio Plazibat, Chaiyo Sitteacherjulun, Stanislav Voytenko, Carlos Ulberg and Bruno Susano. This run culminated in a title fight with Stéphane Susperregui for the WAKO World K-1 Heavyweight title. Maslobojev won by a fourth-round TKO, after Susperregui's corner was forced to throw in the towel. This winning streak was ended by Ondrej Hutnik at Yangames Fight Night 5, when the two of them fought for the WKN European Oriental Rules heavyweight title, with Hutnik winning a majority decision.
In his next fight, Maslobojev was scheduled to fight Petros Vardakas. Maslobojev knocked Vardakas out in the second round.

ONE Championship

Following a TKO victory against Noureddine Ajnaou at KOK`55 World Series, Maslobojev signed with ONE Championship. He made his organizational debut at |ONE Championship: Grit and Glory, in a rematch with Antonio Plazibat. Maslobojev won the rematch by unanimous decision. In his second fight with ONE, he fought Florent Kaouachi at ONE Championship: Pursuit of Power, and won by unanimous decision.

Return to KOK

Moving away from ONE Championship, Maslobojev earned a unanimous decision against Rafael de Souza and a stoppage win against Fraser Weightman.

GLORY

In the second part of 2019, Maslobojev signed with GLORY. He was scheduled to make his debut against John King at Glory 68. King later withdrew, and Maslobojev was rescheduled to fight Bahram Rajabzadeh at Glory 69: Düsseldorf. He won the fight by unanimous decision.
Maslobojev was next scheduled to fight a rematch with Fraser Weightman at Glory 73. The fight fell through, as Weightman was unable to gain a visa to fight in China. He was next set to face the K-1 heavyweight champion Roel Mannaart at Glory 75: Utrecht. Sergej won the fight by TKO, breaking Roel's jaw in the first round.
Maslobojev was scheduled to fight Luis Tavares at Glory 78: Arnhem. He later withdrew from the bout with an injury.
Maslobojev was scheduled to face Donegi Abena at Glory: Collision 3 on 23 October 2021. He won the fight by split decision.
Maslobojev was scheduled to face Olivier Langlois-Ross at KoK Mega Battle on 20 November 2021. He won the fight by unanimous decision.
Maslobojev was booked to face Nika Kulumbegashvili at KOK 99 Mega Series on 19 March 2022. He won the fight by unanimous decision.

GLORY Light heavyweight champion

Maslobojev was expected to face the #1 ranked Glory light heavyweight contender Luis Tavares for the vacant Glory Light Heavyweight Championship at Glory 81: Ben Saddik vs. Adegbuy 2 on 20 August 2022. The fight was cancelled on 10 August 2022, due to "reasons on the part of Tavares". Later that day, it was revealed that Tavares had tested positive for performance enhancing drugs. Maslobojev was instead scheduled to face Tarik Khbabez for the vacant title. Maslobojev won the fight by split decision.
Maslobojev made his first title defense against the one-time Glory light heavyweight title challenger Donegi Abena at Glory 83 on February 11, 2023. He lost the fight by a fourth-round technical knockout. The ringside physician stopped the fight due to a cut on Maslobojev's right shin.
Maslobojev faced Rhys Brudenell at KOK 117 Mega Series in Vilnius. He won the fight by first-round knockout.

Later GLORY career

Maslobojev faced Bogdan Stoica in the quarterfinals of the Glory Light Heavyweight Grand Prix, held on June 8, 2024, in Rotterdam, Netherlands. He won the fight by a first-round technical knockout. Maslobojev next faced Bahram Rajabzadeh in semifinals of the one-day tournament. He retired from the contest 20 seconds into the second round, after a headbutt from Rajabzadeh left him with a cut on his chin.
Maslobojev faced Mohammed Hamdi at UTMA #9 on September 28, 2024. He won the fight by unanimous decision.
Maslobojev faced Ștefan Lătescu at Glory Collision 7 on December 7, 2024. He won the fight by unanimous decision.
Maslobojev faced Jimmy Livinus at UTMA #11 on February 22, 2025. He won the fight by a second-round knockout.
Maslobojev challenged the Glory Light Heavyweight champion Tarik Khbabez at Glory 100 on June 14, 2025. He won the fight by a fourth-round technical knockout.
On August 26, 2025, Maslobojev vacated the Glory Light Heavyweight Championship following a positive test to a banned substance on a sample coming from Tarik Khbabez fight which took place at Glory 100 on June 14, 2025.
Maslobojev faced Alexandru Burduja at UTMA #16 on January 31, 2026. He won the fight by a first-round technical knockout.

Titles and accomplishments

Kickboxing

Professional

World Kickboxing Association
* 2007 WKA Kickboxing World Heavyweight Champion
Baltic Muay Thai Federation
* 2009 Baltic Light Heavyweight Champion
King of Kings
* 2011 KOK European Heavyweight Grand Prix Winner
* 2015 KOK Light Heavyweight Champion
European Union of Martial Sports
* 2015 EUMS Kickboxing Light Heavyweight World Champion
World Association of Kickboxing Organizations
* 2017 WAKO Pro K-1 World Light Heavyweight ChampionGlory
* 2025 Glory Light Heavyweight Championship
* 2022 Glory Light Heavyweight Championship
* 2022 Fight of the Year

Amateur

World Association of Kickboxing Organizations
* 2012 WAKO European Championship K-1 -91 kg
* 2013 Polish Kickboxing Open K-1 -91 kg
* 2013 WAKO World Championship K-1 -91 kg
* 2014 WAKO European Championship K-1 -91 kg
* 2019 WAKO World Championship K-1 -91 kg
World Amateur K-1 Federation
* 2018 WAK-1F World Championship K-1 -91 kg

Boxing

2012 Bigger's Better 17 Heavyweight Tournament Winner
2013 Bigger's Better 26 Heavyweight Tournament Winner

Kickboxing record

Amateur record