 Kozyreva akamirira nyika yake pa2014 World Sprint Speed Skating Championships, akapedza 16th zvachose uye pa2015 World Single Distance Speed Skating Championships akakwikwidza mumutambo wemamita mazana mashanu 19th. Akakwikwidzawo kumakwikwi epasirese, kusanganisira ISU Speed Skating World Cups uye 2013 Winter Universiade. 