Sunderland are believed to be leading the race to sign Swansea City forward Danny Graham.
The 27-year-old, who has started fewer than half of the Swans' league games this season, has also attracted reported interest from Newcastle United, Reading and Norwich City in recent weeks.
However, according to Sky Sports News, the Black Cats have already made an official enquiry for Graham and are ready to follow it up by lodging a firm bid.
Bookmaker Sky Bet make Sunderland the 1/2 favourites to sign Graham before February 1.
