Kammala jumla mai zuwa: Grigorenko ya fara wakiltar Rasha a matsayin ɗan shekara 15 a gasar tunawa da Ivan Hlinka ta 2009 inda Rasha ta zama ta biyu. A cikin babban aikin matasa na duniya tare da Rasha, Grigorenko ya taimaka wa Rasha ta tattara lambobin yabo guda uku a jere a Gasar Zakarun Duniya, tare da lambar azurfa a Kanada a shekarar 2012 sannan kuma lambar tagulla guda biyu a kasarsa ta Rasha a 2013 da Sweden a
Shekarar 2014.