West Ham midfielder Pedro Obiang looks set to miss the rest of the season after he was injured against Leicester on Saturday.
Obiang, 24, who has emerged as one of West Ham's most consistent performers this term, appeared to roll his ankle during the second half of the 3-2 defeat at the London Stadium and was carried off on a stretcher.
West Ham had already lost defender Winston Reid to an adductor injury in the first half, and he is due to undergo a scan later this week.
However, the club fear their New Zealand international could face around six weeks on the sidelines.