Rubuta ci gaba don wannan sakin layi - A EuroBasket na 2007, Giannakis ya jagoranci Girka zuwa na huɗu. A Wasannin Olympics na Beijing na 2008
, ya jagoranci Girka zuwa matsayi na biyar. A watan Disamba na 2008, Giannakis ya ƙare matsayinsa na babban kocin ƙungiyar ƙwallon ƙafa ta ƙasar Girka. Jonas Kazlauskas ne ya gaje shi a wannan rawar.