Charis Mavrias could remain at Panathinaikos beyond the end of this season, according to a report in the Sunderland Echo.
Mavrias joined Panathinaikos on loan at the start of the campaign and he has impressed at the club, where he has received regular first-team action.
Panathinaikos are now in talks with Sunderland to sign Mavrias on a permanent deal and the Black Cats will reportedly be willing to let him go if they receive a bid of an acceptable amount.
Mavrias was brought to the Stadium of Light back in 2013, but he struggled to make an impact on Wearside.
The 21-year-old was tipped to have the potential to be a future star, but he has made just six appearances for the Black Cats and it seems that he will not add to that total.
If he does head back to Greece he will be hoping to get his career back on track after what has been a hugely disappointing spell in the Premier League.
The Sunderland Echo also reports that Valentin Roberge and El-Hadji Ba could follow Mavrias out of the exit door this summer, with the club looking to have a major clear-out in the upcoming transfer window.