Sky Sports understands West Ham are hoping to extend the trial of Chelsea youngster Walter Figueira after he impressed for their Under-18s against Arsenal.
The 17-year-old marksman, who scored in Saturday's 2-0 U18s victory over the Gunners, initially joined the Hammers for a week.
The Londoner has been with Chelsea for the past three years after joining from Hampton & Richmond Borough FC.
West Ham are keen to see more of Figueira with a view to making the youngster's stay a permanent arrangement.
Figueira, who is out of contract in the summer, will have another chance to impress when the Hammers' U18s take on West Brom on Saturday.