'I wish to announce my decision, with immediate effect, to resign as manager of Wolverhampton Wanderers Football Club.," he said.
'It has been a very difficult decision but I feel that my expectations and the club's expectations have drifted too far apart in recent weeks. This decision has been made early in pre-season for the benefit of the club.
'I would like to take the opportunity of thanking the board, players, staff and fans for their support and efforts and wish everyone connected with Wolverhampton Wanderers every success in the future.'