Watford have rejected a transfer request from Mike Williamson, it has been confirmed.

The centre-half has been the subject of a seven-figure bid from an un-named club, widely believed to be Portsmouth.

Williamson only joined Watford from Wycombe Wanderers in January for around £150,000.

The fee was low because the defender's contract was set to run out this summer but Wycombe negotiated a massive sell-on clause, which could be as high as 25 per cent.