The 23-year-old made 16 appearances after joining from Bursaspor in January but has not impressed manager Paolo Di Canio and returns to the Turkish Super Lig for a year on loan
The 23-year-old only joined the Black Cats in January, from Turkish Super Lig outfit Bursaspor, and he made 16 appearances in the second half of the season.
|WEAR ON A ROLL|
|5/2||Sunderland are 5/2 with Bet365 to finish in the Premier League top half|
The Wearsiders confirmed the deal with a brief statement on their official website.
N'Diaye, a France youth international who has represented his country at Under-21s level on one occasion, will now link up with an Eskisehirspor side who finished eighth in the Super Lig last season.