Sunderland have agreed a fee with Turkish side Bursaspor for France Under-21 midfielder Alfred N'Diaye, Press Association Sport understands.
Black Cats officials flew to Turkey with an improved offer after their initial bid, said to be in the region of £2million, was turned down.
Combative 21-year-old N'Diaye started his career with French club Nancy before moving to Bursaspor in July 2011.
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