Joseph Parker has enlisted the help of All Blacks ' mental skills guru Ceri Evans to give himself an edge for his heavyweight title fight in Auckland next month .
Ceri Evans is a man who played a crucial part in their winning the last two Rugby World Cups .
Joseph Parker has enlisted the help of All Blacks ' mental skills guru Ceri Evans , a man who played a crucial part in their winning the last two Rugby World Cups , to give himself an edge for his heavyweight title fight in Auckland next month .