Early career Guskov made his MMA debut on 20 December 2015 against Biksultan Saburzhanov, where he defeated his opponent in the first round. His following fights took place at various tournaments, such as MMA-SERIES, MPL, FIGHT NIGHT GLOBAL, Gladius Glory Championship, Golden Team Championship, Alliance Fighting Championships, Battle of Titans, Zolotoy Vityaz MMA Golden Knight and Tech-Krep FC. Guskov compiled a record of 14–2 and was riding a four-fight win streak, before being signed by the UFC. He lost the fight via a rear-naked choke submission in the first round. Guskov faced Zac Pauga on 10 February 2024 at
UFC Fight Night 236. He won the fight via knockout in the first round. This fight earned him a
Performance of the Night award. Guskov faced
Ryan Spann on 27 April 2024 at
UFC on ESPN 55. He won the fight via technical knockout as a result of ground-and-pound punches. This fight earned him his second
Performance of the Night award. Guskov was scheduled to face
Johnny Walker on 18 January 2025 at
UFC 311. However, Walker withdrew from the fight due to an injury and was replaced by promotional newcomer
Billy Elekana. He won the fight via a guillotine choke submission in the second round. Guskov faced
Nikita Krylov on 26 July 2025 at
UFC on ABC 9. He won the fight by technical knockout in the first round. Guskov was scheduled to face former
UFC Light Heavyweight Champion Jan Błachowicz on 22 November 2025 at
UFC Fight Night 265. However, for unknown reasons, it was moved and took place on 6 December 2025 at
UFC 323. The bout ended in a majority draw. Guskov was scheduled to face
Jan Błachowicz in a rematch on 9 May 2026 at
UFC 328. However, Błachowicz withdrew due to a
torn meniscus, leaving it unclear whether a replacement will be secured. == Championships and accomplishments ==