 Following state representative honours at under-14 and under-15 level, Giannou was selected for the VIS by Ernie Merrick.He took part in Melbourne Victory's pre-season friendlies prior to the 2006–07 A-League season with an intention of being signed in an apprenticeship capacity.However, Giannou secured a two-week trial with PSV Eindhoven's Reserve and Academy teams.