Michael Essien henceforth will be coached by Andrea Stramaccioni, after the Greek side announced on Monday the signing of the former Inter Milan boss.
Essien, a former Chelsea and AC Milan star, joined Panathanaikos earlier in the summer but has been unable to make his debut for the club following series of injuries.
He will now have to work under Andrea Stramaccioni and hope to be injury free.
The 39-year-old trainer’s first game in the dugout will be the Athens derby against fierce rivals Olympiakos after the international break.
The former Udinese and Inter boss takes over from Giannis Anastasiou, who left the club by mutual consent last week, signing an 18-month deal in Athens.
Stramaccioni, 39, takes over a side second in the Greek Super League, having coached Inter and Udinese for a season each following a playing career cut short by a serious knee injury.
Panathinaikos sit eight points behind leaders and defending champions Olympiacos ahead of the sides’ clash following the international break.
The league’s top two meet for the ‘Derby of the Eternal Enemies’ at the Stadio Apostolos Nikolaidis on November 21.