Later that year, Varlamov established himself as the starting netminder for Russia's under-18 squad at the 2006 IIHF World U18 Championships and finished in fifth place. He began the 2007 Super Series as Russia's starter at the under-20 level, but was later pulled in the series in favour of Sergei Bobrovsky. He regained the starting position at the 2007 World Junior Championships and recorded a 1.51 GAA (second among tournament goalies to Carey Price of Canada) along with two shutouts. Russia was, however, defeated by Canada for the second consecutive year in the gold medal game to earn another silver medal.