England and Wales could battle it out to become world leaders

• Cardiff winners will top rankings if All Blacks lose to Australia• World Cup warm-ups ‘like poker’, says coach Scott WisemantelAccording to the number-crunching boffins who compile World Rugby’s rankings this could be the most significant weekend for a decade. Should Australia beat New Zealand for the second consecutive weekend the winner of the match between Wales and England in Cardiff is poised to take over as the world’s top side just over a month before the World Cup kicks off in Japan.Within England’s camp, however, no one is getting too excited. Players and coaches alike would prefer …