Mezue ahịrịokwu na-esonụ: Na EuroBasket 2007, Giannakis duziri Gris ruo ebe nke anọ. Na
Na 2008 Beijing Summer Olympics, o duziri Gris ka ọ bụrụ onye nke ise. N'ọnwa Disemba 2008, Giannakis kwụsịrị ọrụ ya dị ka onye isi nchịkwa nke ndị otu egwuregwu mba Gris. Onye nọchiri ya n'ọrụ ahụ bụ Jonas Kazlauskas.