Sunderland have completed the signing of Greek winger Charis Mavrias from Panathinaikos, according to BBC Sport.
The 19-year-old Greece international has agreed a three-year deal with the Black Cats after joining for an undisclosed fee
Mavrias made his Champions League debut as a 16-year-old in 2010, becoming the second-youngest player ever to figure in the competition. The teenager has made 59 domestic and 11 European appearances for Panathinaikos, scoring six goals.
He has also made two appearances for Greece, having also appeared at Under-17, Under-19 and Under-21 levels for the national side.
Mavrias, who will wear the number 35 shirt, is Sunderland's 11th signing of the summer with the club already signed the likes of Jozy Altidore, Ondrej Celustka, Modibo Diakite and Emanuele Giaccherini.
Along with Giaccherini, the Mavrias deal may have been completed as a replacement for James McClean, who would have seen himself well down the pecking order this season and subsequently decided to move to Wigan for a fee above £1 million.
The Derry-born winger was in action against Manchester United in the Community Shield and has been reunited with the number 11 shirt he wore before moving to England.
The Black Cats have made a healthy profit on McClean, who they originally snapped up from Irish side Derry City for a bargain £350,000 in 2011.
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