Wallabies Book World Cup Final Against AB's

International rugby's top two ranked sides will meet in Sunday's Rugby World Cup final.

The Wallabies booked a first trans-Tasman Rugby World Cup final by beating Argentina 29-15 in the second semi-final at Twickenham.

Veteran winger Adam Ashley-Cooper was named man of the match after scoring a hat-trick, but Australian coach Michael Cheika says their defence in the final 20 minutes was the difference.

"That's something that we want to be able to do no matter what, because you know it's a sign of your teams spirit, but we did need to get some ball at some stage. Towards the end of the game we started getting the ball back a bit so we were able to get a score there."

Despite having featured in six of the seven previous world cup finals, it's the first time New Zealand and Australia will meet in the tournament decider.

Radio Sport