Ryan Nelsen believes West Ham have issued a statement of intent by tying Winston Reid to a new deal.
Tottenham are keen for striker Shaquile Coulthirst to continue his development out on loan after his spell at Southend.
Bolton have signed West Ham forward Robert Hall on loan until the end of the season.
The striker, 19, who can also operate as a winger, is available to Trotters boss Dougie Freedman for Saturday's trip to Charlton.
England youth international Hall spent time with Wanderers' npower Championship counterparts Birmingham earlier this season, where he played 13 games, including the full 90 minutes in a 3-1 December defeat at the Reebok Stadium.