Career
And in 4x100 m mixed freestyle (with Arina Openysheva, Elisei Stepanov and Mariia Kameneva at a time of 3:3030). and bronze in mixed 4x100 m freestyle (with Mariia Kameneva, Arina Openysheva and Igor Shadrin).
And in 4x100 m mixed freestyle (with Arina Openysheva, Elisei Stepanov and Mariia Kameneva at a time of 3:3030). and bronze in mixed 4x100 m freestyle (with Mariia Kameneva, Arina Openysheva and Igor Shadrin).
In 2014, Kozlov"s first major international meet at the 2014 European Junior Championships, he won a bronze medal in men"s 50 m butterfly. In June 2015 at the inaugural 2015 European Games in Baku, Kozlov won won gold medal with the Russian Team in men"s 4x100 m medley (with Daniil Pakhomov, Anton Chupkov and Filipp Shopin touching in 3:3638), a new junior world record breaking the previous record held by Russia in 3:38.02 at the 2014 Youth Olympics. Kozlov also won bronze in the individual men"s 100 m freestyle and with the Russian Team in men"s 4x100 m freestyle. In August 25-30, Kozlov competed at the 2015 World Junior Championships in Singapore, he won gold with the Russian team in men"s 4x100 medley (with Daniil Pakhomov, Anton Chupkov, Roman Larin, touching in 3:3644), taking a meets record.