During the 2011 Rugby World Cup Weepu played out of position in the last pool match against Canada, coming off the bench during the second half to play fullback as a replacement for Mils Muliaina. There was great pressure on the All Blacks to win the Cup, not having won it since 1987. This time round it looked to be New Zealand's year, but All Blacks playmaker Dan Carter was struck with a season-ending groin injury. This caused much media attention, and betting odds in favor of the All Blacks began to decrease. In the All Blacks vs Argentina quarter-final match, Weepu took on Carter's goal kicking duties. Landing seven penalties, with only a missed conversion, Weepu was named Man of the Match, helping guide New Zealand to victory, as well as earning him the nicknames "Mr Fixit" and "saviour". In the final against France he missed two penalties and a conversion; however, New Zealand emerged victorious due to a Tony Woodcock try and a Stephen Donald penalty.