Competition key to All Blacks' success - Dagg

Rugby Union - Championship - New Zealand All Blacks vs Argentina Pumas - New Plymouth, New Zealand - September 9, 2017 - New Zealand's Israel Dagg scores a try. REUTERS/Nigel Marple/Files

TOKYO (Reuters) - Relentless competition for places has been the driving force for New Zealand players during an unprecedented run of success, former fullback Israel Dagg said, as the All Blacks head into their third consecutive Rugby World Cup semi-final.

New Zealand, winners of the last two World Cups, face England in the semi-final of this year's tournament on Saturday, having looked at their dominating and ruthless best in the hunt for a third successive title.