West Ham have shown interest in signing Marcus Rashford from Manchester United but the cost is a hurdle.
The Hammers, who confirmed Graham Potter's appointment as manager on Thursday morning, are struggling in forward areas.
West Ham are currently without captain and top scorer Jarrod Bowen, who is expected to be out for another five weeks with a fractured foot.
Michail Antonio is also on the sidelines following a car accident that left him fearing for his life last month, with the 34-year-old expected to miss the rest of the season with a broken leg.