Representing Russia, Morozova/Zhirnov made their junior international debut in November 2010 at the NRW Trophy. In September 2011, they placed fifth at their first ISU Junior Grand Prix (JGP) assignment, in Riga, Latvia. In the 2012–13 JGP season, they ranked fourth in Lake Placid, New York before winning bronze in Chemnitz, Germany. They finished fourth at the 2013 Russian Junior Championships.