[2] 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.

Morozova/Zhirnov took bronze at both of their 2013–14 JGP events, in Minsk, Belarus, and Tallinn, Estonia, and came in sixth at the 2014 Russian Junior Championships.

[4] They placed fourth at the JGP in Zagreb, Croatia and qualified for the ISU Junior Grand Prix Final, where they finished sixth.