He was for years the club's main goalkeeper, until 1974 when he was accused of bribery in a match against Olympiacos by Aris president, Kampanis.
On 16 March 1977, in the UEFA Cup match against QPR, while the game was at the extra time and was heading to a penalty shoot-out, František Fadrhonc decided to replace his main goalkeeper, Lakis Stergioudas with Christidis.
He stayed at AEK, where he won the 1978 double, the 1979 championship and finished his career in 1982, when he was 38 years old.
Karditsa, Ionikos, Edessaikos, Kalamata, Paniliakos, Sparta, Trikala and Chania.
In 1998 he worked as an assistant to Giannis Kollias in Greece U21 and in 2000 as an assistant to Vasilis Daniil in Greece, while in 2001 he was their first coach, in a friendly match against Russia, before Otto Rehhagel took over the technical leadership.