Dimitri Payet does not require surgery on his ankle injury but the West Ham star will still be missing for three months.
The France international and Hammers team-mate Enner Valencia saw specialists on Monday after both players were injured during the 1-1 draw with Everton at Upton Park on November 7.
Valencia is expected to return at the start of the New Year but Payet is likely to be missing until February.
A West Ham statement said: “Valencia was advised that he needs an extended rehabilitation period, which has now begun.
“It is expected that he will be fully recovered by the beginning of the New Year.
“Payet also attended an appointment with a specialist on Monday morning and, along with the club’s medical team, he was advised he does not need an operation.
“He will therefore start his rehabilitation programme immediately, but is still expected to be unavailable for selection for three months.”