Skysports.com understands Steve Sidwell is currently undergoing a medical at West Ham as he looks to secure his switch from Aston Villa.
The former Chelsea and Reading midfielder, who has recently recovered from an Achilles problem, is being put through his paces at the club's training ground as the Hammers look to make Sidwell their first signing of the January transfer window.
West Ham are thought to have agreed a cut-price fee for Sidwell with the 28-year-old's contract at Villa due to expire in the summer.
Hammers boss Avram Grant is keen to bolster his squad as he looks to help them climb away from trouble at the wrong end of the table and he sees Sidwell's arrival as a key addition for the second half of the season.
Sidwell has struggled to make an impact at Villa since joining from Chelsea in the summer of 2008 and he is keen to find regular first-team football.
If all goes well with the medical, Sidwell will seal the switch to Upton Park for the start of January when the transfer window officially opens.