England were dumped out of the 1999 World Cup by South Africa at the quarter-final stage and the memory of that is driving Johnson on. He does not believe England's 53-3 thrashing of South Africa at Twickenham last November gives his team a major psychological advantage, as there have been numerous changes in the opposition lineup-"Twickenham has no relevance and South Africa remain the most physical side you can play against," said Johnson.