"Beşiktaş" has loaned the football player. Sport24.az reports that Joao Mario has agreed with AEK.
The Portuguese midfielder will play on loan at the Athens club until the end of the season.
The 32-year-old footballer's contract with "Beşiktaş" is valid until June 30, 2027.
The former member of the Portuguese national team has also played for "Sporting", "Inter", "West Ham", "Lokomotiv" (Moscow).