Ghana midfielder Mubarak Wakaso has started training with Panathinakos, days after joining on a three-year deal.
Wakaso, 25, trained for the first time with his teammates as they prepare for the new season.
The former Las Palmas loanee joined the Greens on a bumper deal and is expected to replace compatriot Michael Essien.
Essien has been shipped out after failing to impress since joining from AC Milan.
Wakaso could mark his debut for the side Greek giants in a pre-season friendly against Turkish side Fenerbahçe on Wednesday.