Sergey Kuzmin has two losses against two opponents on his boxing record. For a list of Kuzmin's best fights, refer to "Best fights of Sergey Kuzmin".
On December 12, 2020 Sergey Kuzmin faced off against Martin Bakole in a heavyweight bout at age 33. He was coming in with a record of 15-2 (11), and Bakole was 27 years old and with a record of 15-1 (12). Kuzmin lost the fight via 10-round unanimous decision.
On September 13, 2019 Sergey Kuzmin faced off against Michael Hunter in a heavyweight bout at age 32. He was coming in with a record of 15-1 (11), and Hunter was 31 years old and with a record of 17-1 (12). Kuzmin lost the fight via 12-round unanimous decision.
