Sunderland are said to be in the race to land Toulouse forward Martin Braithwaite but face a battle to sign him.
The 25-year-old impressed for a struggling Toulouse side last season, netting 11 goals as they just managed to beat the drop in the French top-flight.
His performances have been noted by a number of clubs with Sunderland, Crystal Palace and Hull City all said to be keen to sign him but it is West Ham that have made the first move.
Braithwaite is so keen on a move to the Premier League that he is training in England to help secure a move this summer.
Toulouse want £4million for the Denmark international, but West Ham have offered just £2.5million and that sort of figure is unlikely to put any suitors off, including the Black Cats, as Sam Allardyce looks for new additions.