David Bentley out for six months

West Ham loanee David Bentley will be out of action for up to six months after undergoing knee surgery, the club have confirmed.

The 27-year-old, who joined the Hammers on a season-long deal from Tottenham Hotspur at the end of August, was forced to go under the knife after picking up an injury during training.

"It is a great shame for David as he had settled in well to the squad. We wish him well and hope he has a speedy recovery," manager Sam Allardyce told West Ham's official website.

Bentley has made five appearances for the club since moving to Upton Park.