Sydney Olympic FC
Petratos is of Greek ancestry, and comes from a footballing family. His father Angelo played as a defender for Sydney Olympic FC, His younger brother Kosta was his teammate at the Jets, His younger sister Panagiota currently plays for the Newcastle W-League team, His younger brother Maki is currently playing for the Newcastle Jets FC Reserves and his youngest sister Anastasia is currently playing Under 11s at Sydney Olympic FC.