West Ham are adamant Dimitri Payet will not be sold in this transfer window — despite the Frenchman refusing to play for the club again.
Payet, 29, was sent to a back specialist on Thursday after claiming he was injured and could not train.
West Ham are sceptical about the timing of the fitness issue, although determined to ensure it is investigated thoroughly. Co-owner David Sullivan will meet the player's agent Jacques-Olivier Auguste on Friday to discuss the next step.
Manager Slaven Bilic broke the news at a press conference on Thursday, and Payet is not expected to feature in Saturday's crucial home match against Crystal Palace.