On 29 January 2021, in Moscow (Russia) Mullojonov made his debut in the professional ring, ahead of schedule by technical knockout in the 2nd round, defeating Russian Alexander Stepanov (2–2).
At the end of September 2021, he became the world champion at the 58th Military World Boxing Championship in Moscow (Russia) held under the auspices of the International Military Sports Council, in the final, by a split decision of the judges, defeating an experienced Russian Svyatoslav Teterin.[2][3]
At the end of October – at the beginning of November 2021 in Belgradee (Serbia), participated in the 2021 AIBA World Boxing Championships in the category over 92 kg. Where in 1/16 finals defeated the experienced Iranian Puria Amiri on points,[4] in the 1/8 finals he defeated the Brit Delicious Ori,[5] but in the quarterfinal on points in a competitive battle he lost to the Armenian David Chaloyan[6] – who became the silver medalist of this world championship.
2022
In February 2022, he became the champion in the weight category over 92 kg of the prestigious international Strandzha Cup held in Sofia (Bulgaria),[7] where he defeated the experienced Russian Yaroslav Doronichev,[8] then in the semi-finals by points of victories Kazakh silt Nurlan Saparbay, and in the final he defeated the experienced German boxer Nelvy Tiafaka.[9]
1904–1908: +158 lb (71.7 kg) · 1920–1936: +175 lb (79.4 kg) · 1948: +80 kg · 1952–1980: +81 kg · 1984–2012: 81–91 kg · 2016–2020: 82–91 kg · 2024–: 81–92 kg
