Career
He fights for M-1 Mixfight. Sildelnikov fought for the first time on North Americain soil at Affliction: Day of Reckoning, losing to Paul Buentello. Following the fight Kirill Sidelnikov was suspended for testing positive for Stanozolol.
The suspension period is retroactive to the conclusion of the bout on January 24 and runs through January 18, 2010.
He has been fined $2,500. The mere presence of Stanozolol in the system constitutes a violation under the new testing procedures for CSAC. Sidelnikov claimed that the substance had been prescribed to him to recover from injury, and hence he maintains that he was unaware of his use of the banned substance.
He is among the youngest fighters to compete in a major pay per view event in combat sport history. However, due to his recent suspension from competition in the United States he has solely chose to compete within the M-1 organization, the same organization that gave him his first fight.
Kirill has also been involved in combat sambo competitions, and in the Russian championships of 2009 he advanced to the semifinals, while in 2010 he advanced to the finals.
On November 19, 2010, he participated in RCT - Russian Cities Tournament, held in Lipetsk, Russia, where he fought and defeated by unanimous decision Vladimir Kuchenko.