Career
Born in Platanistos, Euboea, Polychroniou"s family moved to Athens when he was six months old. Polychroniou is considered as one-club man spending his entire career playing for the Greek Giants Olympiacos F.C. making 305 appearances in Alpha Ethniki and a total of 662 caps in all competitions(also include 239 friendly games). Kostas Polychroniou capped 27 times for Greece.
He managed Larissa, Rodos, Doxa Drama, Apollon Smyrni, Levadiakos, Olympiacos, Greece, Ionikos, Paniliakos.