In the 2009–10 season, Voronov was assigned to the 2009 Cup of China, where he took bronze, and 2009 Trophée Eric Bompard, where he was sixth. He won the silver medal at the 2010 Russian national championships. Voronov was sent to Europeans but his 14th-place result led Russia to assign the country's second men's spot at the Olympics and Worlds to Russian national bronze medalist Artem Borodulin (along with Evgeni Plushenko). Plushenko's withdrawal from the 2010 World Championships due to injury allowed Voronov to be called up as a late replacement. Voronov would place 14th. This placement, along with Borodulin's withdrawal during the competition, meant Russia would have one men's berth to the 2011 World Championships. At the end of the season, he left coach Alexei Urmanov and moved back to Moscow to be coached by Nikolai Morozov.