|World Cup quarter-final: South Africa v Wales|
|Venue: Twickenham Date: Saturday, 17 October Kick-off: 16:00 BST|
|Coverage: Live on BBC Radio Wales, Radio Cymru and BBC Radio 5 live, plus live text commentary on the BBC Sport website.|
Jamie Roberts says Wales are ready to match South Africa blow for blow in Saturday's World Cup quarter-final.
He has faced the Springboks 10 times, including twice for the 2009 British and Irish Lions, and only won once.
But that came in their last encounter in November 2014, a 12-6 win in Cardiff that Roberts says Wales can replicate.
"This week all the players are relaxed but ready for complete warfare, come the 80 minutes," said the 28-year-old Harlequins centre.
|Like this? Read these...|
|Preview: South Africa v Wales (Sat)|
|Wales need 'A' game, says Anscombe|
|Cleverly loses on points to Fonfara|
"Having played South Africa many times in my career, you have to match them physically before anything else.
"The way they play the game, if you lose the battle of the gain-line you are 80-90% towards losing the game.
"They have gone back to how they play the game best - that's how they won the World Cup [in 2007]. That is the challenge that faces us, but for us to get that win last November was a huge step in our learning curve.
"It is a World Cup quarter-final and to play in games of this magnitude is what you dream about."
Injuries have deprived Roberts of a string of midfield partners, with fellow Lion Jonathan Davies ruled out before the World Cup, and Scott Williams and Cory Allen suffering injuries during the tournament that ended their participation.
Instead Roberts, who will win his 74th Wales cap at Twickenham, will line up alongside 20-year-old Tyler Morgan - winning only his third cap.
"He is probably mature beyond his years," said Roberts. "On the international stage that's a good sign, young players making good decisions.
"I think he's ready for it. He is physical, he is young, he is willing to learn, he is energetic. He has got all the attributes to help Wales win a World Cup quarter-final."
|More from rugby:|
|Get World Cup alerts direct to your phone|
|Rugby World Cup 2015 fixtures and groups|
|For the latest rugby union news, follow @bbcrugbyunion on Twitter|