Nijat Huseynov was born on 31 March 2003, in Baku.[1] He graduated from the Coaching Faculty of the Azerbaijan State Academy of Physical Education and Sport.[2]
As a junior, his coach was world champion and Olympic medalist Aghasi Mammadov.[3]
In April 2021, Huseynov won a bronze medal in the 49 kg category at the 2021 AIBA Youth World Boxing Championships held in Kielce, Poland.[4]
In March 2022, he became the European U22 Boxing champion in the 51 kg weight category in Poreč, Croatia.[5][6] In the final, he defeated Georgian boxer Lekso Khasaya.[7]
In October 2022, representing the UGİM-1 Club, Huseynov placed second at the Azerbaijani Boxing Championship, losing in the final to Masud Yusifzade from the BFL Club.[8]
In May 2023, Huseynov was selected for Azerbaijan's senior team to compete at the World Boxing Championships in Tashkent. He won his first bout against Po Hau Hsu (Taiwan) in the 1/16 finals of the 54 kg category with a score of 5:0.,[9] but lost in the 1/8 finals to 2016 Olympic silver medalist Segundo Finol from Venezuela with the same score.[10] He attributed his loss to biased refereeing.[3]
In November 2023, Huseynov defended his European Youth (U22) Championship title in Budva, Montenegro, defeating Armenian boxer Rudolf Garboyan in the final with a score of 5:0.[11]
In March 2024, he participated in the World Boxing Olympic Qualification Tournament in Busto Arsizio, Italy. Competing in the 51 kg category, Huseynov defeated India's Deepak Deepak, a World Championship medalist, in the 1/32 finals, followed by wins over European champion and World runner-up Sakhil Alakhverdovi (Georgia) and Armenian boxer Rudolf Garboyan. In the quarterfinals, Huseynov beat Roscoe Hill, a silver medalist at the previous World Championship. Despite a knockdown in the first round, Huseynov turned the bout in his favor in the next two rounds, winning 3:2. His semifinal qualification secured him a spot at the 2024 Summer Olympics in Paris.[12][13] Competing in Olympics, Huseynov reached the Round of 16 in the men's 51 kg boxing event before being eliminated.[14]