The 27-year-old Benin international has been in impressive form for the Black Cats this season, and was recently praised by Martin O'Neill as the leading light at the Stadium of Light since his arrival on Wearside back in December.
The attacking midfielder has often operated as an emergency striker for Sunderland this season, and has chipped in with seven goals in all competitions.
After yesterday's 5-2 derby defeat, Tottenham will be hoping to get one over their local rivals when the transfer window reopens in June, and a bid in the region of £10million could be enough to do so.
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