German club Stuttgart are believed to me keen on Middlesbrough striker Tuncay Sanli.
The Turkey international has been linked with a Premier League return with either Aston Villa, Tottenham, Everton and Liverpool but Stuttgart's £9million bid could thwart that happening.
It is understood the 27-year old is keen to stay in England but the offer from Stuttgart has clearly outgunned bids from the Toffees and Spurs.