West Ham manager David Moyes said there "is a chance" he will be active on deadline day after watching his side beat Derby to set up an FA Cup fifth-round tie at Manchester United.
Moyes ideally would not bring anyone else in because "we spent all our money in the summer" and brought in striker Danny Ings earlier this month.
But with Ings and central defender Kurt Zouma injured for indefinite spells, Moyes may have to act.
"If both were fit, we wouldn't need anyone but we are a little bit short," he said after the 2-0 win at Pride Park.