West Ham boss David Moyes says Lucas Paqueta is an injury concern.
The midfielder has been missing since the start of January.
"Paqueta has been away in Madrid, he's back [at Rush Green]," Moyes said. I can't give a full update as I don't know all the stuff but he's been re-scanned again. That's as much as I know."
Asked whether the injury is proving complicated, Moyes added: Possibly, yeah, possibly. But he is a boy who can come back just like that and could be back immediately.
"I really don't know how about him and how he is at the moment."