Both New Zealand and South Africa will be targeting a fast start to Saturday's Rugby World Cup final, looking for any early lead to set the tone in the clash at Stade de France, All Blacks defense coach Scott McLeod predicted on Monday.

"It's no secret both sides will be focusing on the first 20 minutes," he told a news conference as the buildup to the final between the two traditional foes began.

"It will be about who can execute with accuracy. We've talked about that this morning. We need to be extremely accurate and be able to apply pressure at the same time. But the Boks will also be coming out and wanting to start well, so we'll prepare for that too."