West Ham boss David Moyes says Andy Carroll may need surgery on an ankle injury which scuppered his chances of a move to Chelsea.
West Ham have not given up on signing Joao Mario from Inter Milan, according to Sky sources.
Andy Carroll's chances of securing a move to Chelsea have been hit by the news that he will be sidelined for about a month with an ankle injury.
West Ham have failed in their attempt to recall winger Robert Snodgrass from his loan at Aston Villa, Sky sources understand.
Swansea are interested in bringing West Ham forward Andre Ayew back to the club, according to Sky sources.
Inter Milan midfielder Joao Mario has decided against joining West Ham on loan, according to Sky in Italy.
Nigel Reo-Coker says it is vital West Ham keep hold of Andy Carroll, despite reports linking him with a move during January's transfer window.
West Ham laboured into the fourth round of the FA Cup as they needed extra-time to beat League One Shrewsbury 1-0 at the London Stadium on Tuesday.
Chelsea have made contact with West Ham with the intent of signing Andy Carroll on a permanent deal, but the Hammers will not sell him for less than his valuation, Sky Sports News understands.