He was replaced by assistant coach Mike Gregory and the team improved and reached the Grand Final only to lose to Bradford Bulls 25–12. In 2004 Gregory guided Wigan to the Challenge Cup final at the Millennium Stadium in Cardiff but Wigan lost to St Helens 32–16. It was Mike Gregory's last match as head coach of Wigan, he travelled to the United States of America to get treatment for an illness that he contracted after an insect bite while in Australia.