"We're heading towards a very special sporting weekend in New Zealand as we host some great matches in both Rugby World Cup and as the Warriors go into battle in Sydney in the NRL grand final against Manly," he said.
"I'm pleased a cooperative approach is being taken by both the IRB (International Rugby Board), Rugby World Cup 2011 and the Auckland Council to ensure we can cater for rugby union and rugby league fans on Sunday."
Meanwhile, Mr Key said World Cup ticket sales were still going strong, and were closing in on the $268 million target.
Earlier today, Rugby World Cup New Zealand 2011 chief executive Martin Snedden said the semi-final, in which the All Blacks were expected to play, had sold all but 5000 tickets, while the second semi-final still had between 12,000 and 13,000 tickets available.