Mohamed Diame to leave West Ham United?

West Ham United boss Sam Allardyce has admitted that he would be "powerless" to stop Mohamed Diame leaving the club in January.

The 25-year-old joined the Hammers on a free transfer in the summer, but his form has reportedly attracted the interest of a host of European clubs.

"I don't disclose players' contracts publicly. There's always a situation where you're powerless to keep a player because of the size of the price," Allardyce told reporters.

"You can't turn it down. The chairman says, 'Look, we can't turn that down, Sam - we've got to move him on'."

Diame ran down his contract with Wigan Athletic last season.