Rusty All Blacks will improve for battle with Pumas - Hansen

By Justin Palmer LONDON (Reuters) - New Zealand were rusty and will only improve as the Rugby World Cup progresses, coach Steve Hansen said as the holders needed all their guile and craft to overcome Argentina 26-16 in their Pool C opener on Sunday. Hansen hailed his bench for injecting energy and urgency in the second half as the All Blacks wore down their combative opponents after trailing for 56 minutes at Wembley Stadium. "It took a long time to get on top," Hansen told a news conference.