Sunderland are interested in Freiburg striker Papiss Demba Cisse.

However, the player's price-tag is putting the Black Cats making an offer, says skysports.com.

Blackburn Rovers, Fulham and Tottenham Hotspur are all understood to have checked on Cisse, who is under contract until 2014.

However, Freiburg's reported €15million (£13m) valuation of the 26-year-old has dissuaded clubs from following up with a firm bid.

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