coach subsequently said he had taken ill. Competing at the 2020 Winter Youth Olympics, Mozalev won the silver medal in the men's event and a bronze medal in the team event. Following a bronze medal finish at the Russian Junior Championships, Mozalev was assigned to one of Russia's three men's berths at the 2020 World Junior Championships in Tallinn, Estonia. He placed narrowly second in the short program, behind Youth Olympic champion Yuma Kagiyama. Mozalev then won the free skate, his only error being a hand down on one triple Axel attempt, and won the title. 2020–2021 season Mozalev debuted at the senior Russian test skates, including the quad flip jump, which he landed in the short program. Competing on the domestic Cup of Russia series, he won the silver medals at both the third stage in Sochi and the fourth stage in Kazan, encountering difficulties in the short program at both events but rallying in the free skates. With the COVID-19 pandemic continuing to affect international travel, the ISU opted to run the Grand Prix based primarily on geographic location. Mozalev made his senior Grand Prix debut at the 2020 Rostelecom Cup, landing his quad flip in the short program but botching his jump combination, ending in sixth place in that segment. He was second in the free skate, despite doubling another planned quad flip, and rose to fourth place, less than two points behind bronze medalist Petr Gumennik. Competing at the 2021 Russian Championships, Mozalev took a "painful" fall on a downgraded quad flip to open his short program, placing fourth in that segment nonetheless. He landed the quad flip in the free skate, but a series of subsequent jump errors put him in fifth in that segment, remaining in fourth place overall. Following the national championships, Mozalev competed in the 2021 Channel One Trophy, a televised event organized in lieu of the cancelled European Championships. He was selected for the Red Machine team captained by Alina Zagitova. He was fifth in the short program and fourth in the free skate, while the Red Machine won the trophy. After this, Mozalev prepared for the Russian Cup Final, which was widely assumed to be the deciding event for the second Russian men's berth at the 2021 World Championships in Stockholm. Mozalev was second in the short program despite doing only a triple flip instead of a quad. He fell