Career
Kruglov represented Russia at the 2008 Summer Olympics in Beijing, where he competed in the men"s 10 m air rifle, along with his teammate Konstantin Prikhodtchenko. He finished only in eighth place by seven tenths of a point (07) behind Serbia"s Stevan Pletikosić, for a total score of 697 targets (595 in the preliminary rounds and 102 in the final).