Hansen vigorously defends captain Richie McCaw

New Zealand head coach Steve Hansen has vigorously defended All Blacks captain Richie McCaw after video footage emerged of him apparently striking South Africa flanker Francois Louw during Saturday's World Cup semi-final at Twickenham.

McCaw leading his side out at Twickenham.

Credit: PA

It is unclear whether McCaw made contact with his elbow or hip, and it is an incident that could yet attract the interest of match citing commissioner Mike Rafter.

If that scenario unfolds and 147 times-capped McCaw faces a disciplinary hearing, then a possible suspension would sideline him for next weekend's World Cup final.

The citing commissioner has up to 36 hours after the match has ended to lodge a complaint, setting 6am on Monday as the deadline.

But Hansen, speaking at a press conference in Weybridge on Sunday, said: "There is nothing in it, so there's nothing to talk about. Everyone has got a bit excited, and we move on.

"He (McCaw) is a man that draws a lot of attention because he's been a great player, maybe the greatest player in the history of the game.

"If he is not in your team, he's a pain in the rear end, so it goes that if you can't get him on the track let's get him off the track.

"It's a mark of respect, really. He takes it in his stride, and the team takes it in their stride."

Francois Louw

Credit: PA

Bath forward Louw briefly went off nine minutes after the first half McCaw incident - which happened at a ruck - for treatment to a cut caused during a lineout.

"He had two knocks to his head, and we put some sutures in the one from an elbow during the lineout, but that won't keep him out of the match on Friday," Springboks team doctor Craig Roberts said, ahead of the Springboks facing a World Cup bronze medal match in five days' time.

New Zealand will become the first team in rugby union history to make a successful world title defence if they win the final, but South Africa pushed them all the way before going down 20-18.

"When you have performances like we did in Cardiff (62-13 quarter-final win against France) it's very difficult mentally to get back into that same spot," Hansen added.

"It was a really tight, tough game (against South Africa) where we probably didn't play as well as we could have.

"I think some of our game needs to be looked at. We will go into the final really hungry for a performance.

"We won't be overrating ourselves, which will be good. I think we will lift, there will be enough excitement. The final will be energising in its own right."

Twitter's reaction to New Zealand v Namibia

The All Blacks stormed to a nine-try victory over 20th ranked Namibia this evening but it didn't stop the underdogs getting over the line once themselves.

People have been taking to Twitter to share what they thought of the match.