 At the age of 15 during the 2005–06 season, he made his debut for CSKA-2—the club's junior team—where he continued to play during the 2006–07 season, and averaged more than three points per game.In the same season, Filatov made his international debut for Russia at the World Under 18 Championship.During the 2007–08 season, Filatov made his professional Russian Superleague (RSL) debut with CSKA, seeing limited action in five games.