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After failing to make the breakthrough at the Stadium of Light, Charalampos Mavrias has returned to Greece to sign for former club Panathinaikos on loan until the end of the season.
The 20-year-old had been a regular in match day squads this season but has only featured as an unused substitute and had only made four appearances for the Development Squad, with his only senior appearance this season coming for the Greek national side in a 2-0 home defeat to Serbia in November.
The winger had been linked with the likes of Celtic, as well as various Championship sides, and although it was thought he was reluctant to return to his homeland, Panathinaikos have been able to persuade him to make a return to the Apostolos Nikolaidis Stadium.
