Wales v South Africa: Teams

Flanker Martyn Williams has admitted Wales need to build on their Six Nations success and start taking "big scalps".

The past four seasons have seen Wales win the Grand Slam title twice, only for their record against the southern hemisphere sides to let them down.

They have only beaten Australia once in 20 years, their last win over the All Blacks came 55 years ago, while they have only record one win in 102 years against Saturday's opponents South Africa.

And Williams knows that it is time for Wales to start performing against the Tri-Nations.

He said: "Last year going into the Six Nations, there were no expectations, especially after being knocked out of the World Cup.

"People are looking now not just for us to compete, but to go up a notch and take a big scalp.

"We have got to try to beat one of the three big southern hemisphere teams now so that we can take the next step.

"There is going to be a great atmosphere, and everyone is really excited about it. This will be a proper measure of where northern hemisphere rugby is."

Having lost to the World Cup-winning Springboks last autumn and then twice in the summer, Wales will know exactly what to expect come Saturday.

Williams added: "Wherever they play in the world, South Africa always present a big physical challenge.

Smart

"It is the biggest you will ever face, so it's up to us to be smart and not give them too much ball.

"We are familiar with them, and we want to go out and prove we are better than we showed in the first Test there in the summer (Wales were beaten 43-17 in Bloemfontein).

"I didn't go on tour because of my knee, but that first Test is brought up often by the boys, though we managed to turn it around for the second Test."

Wales coach Warren Gatland will hand debuts to Leigh Halfpenny and Andy Powell for the match while there are recalls for Williams and Lee Byrne.

Gatland was, however, forced into a late reshuffle of his backline when centre Gavin Henson withdrew on Friday due to an Achilles injury.

Henson's place in the starting line-up was taken by Tom Shanklin, with Jamie Roberts switching inside so that Shanklin can operate in his favoured outside centre role.

South Africa have named their strongest possible line-up for the match - with Bakkies Botha cleared to play.

Botha has been out of action since August with knee ligament damage and his surprise call comes just 24 hours after team doctor Craig Roberts said he would only be able to play for around 30 minutes given his current fitness levels.

"He looks to be in good shape and we're prepared to take a chance with him in the starting line-up. We'll see how he does," said coach Pieter De Villiers.

"We are prepared if we have to take him off and we're prepared for all eventualities."

Wales: 15 Lee Byrne, 14 Leigh Halfpenny, 13 Tom Shanklin, 12 Jamie Roberts, 11 Shane Williams, 10 Stephen Jones, 9 Gareth Cooper, 8 Andy Powell, 7 Martyn Williams, 6 Ryan Jones (c), 5 Ian Evans, 4 Alun-Wyn Jones, 3 Adam Jones, 2 Matthew Rees, 1 Gethin Jenkins.
Replacements: 16 Richard Hibbard, 17 Duncan Jones, 18 Ian Gough, 19 Dafydd Jones, 20 Dwayne Peel, 21 James Hook, 22 Andrew Bishop.

South Africa: 15 Conrad Jantjes, 14 JP Pietersen, 13 Adrian Jacobs, 12 Jean de Villiers, 11 Bryan Habana, 10 Ruan Pienaar, 9 Fourie du Preez, 8 Pierre Spies, 7 Juan Smith, 6 Schalk Burger, 5 Victor Matfield, 4 Bakkies Botha, 3 John Smit (c), 2 Bismarck du Plessis, 1 Tendai Mtawarira.
Replacements: 16 Brian Mujati, 17 Gurthro Steenkamp, 18 Andries Bekker, 19 Ryan Kankowski, 20 Ricky Januarie, 21 Frans Steyn, 22 Jaque Fourie.