West Ham manager Alan Curbishley claims his club have accepted a bid from Sunderland for Anton Ferdinand. The 23-year-old defender is reportedly considering the offer, thought to involve a fee of approaching £8million. Curbishley, whose team today lost 3-0 in the Barclays Premier League at Manchester City,said: 'The board have accepted the bid - he's not renegotiated his contract - and the decision was taken out of my hands. 'I don't know where Anton is in terms of signing for Sunderland - but once the club accept the bid it moves on.' Ferdinand's current contract is set to end in 2010. Curbishley, meanwhile, is hoping to sign a defender before the transfer window closes on September 1. 'We are thin on the ground,' he said. 'If we lose another defender we will have to react to that.'