Paul Williams of New Zealand is today's referee.

He blows his whistle and Dan Biggar gets us under way here in Cardiff.

Andrew Coombs
Former Wales lock on BBC Radio Cymru

Wales need to keep a quick tempo. It's the only way to play against South Africa and you can't let them slow the game down.

We've had the pyrotechnics, the anthems have been sung with gusto from both sets of fans, here we go!

Ulster hooker Bradley Roberts is in line to make his Wales debut against the country of his birth.

He's named among the replacements with fellow uncapped player, Scarlets prop WillGriff John.

Image source, Huw Evans Picture Agency

South Africa director of rugby Rassie Erasmus is here in Cardif.

He's currently awaiting the outcome of a misconduct hearing after his criticism of match officials in the first Test against the British and Irish Lions.

Springboks assistant coach Deon Davids said it was "always the plan" to have Erasmus back for the game in Cardiff.

Caryl James
Former Wales wing on BBC Radio Cymru

Wales' fine record in Cardiff against South Africa means nothing. How do you beat the world champions? I'm sure Wales have done their homework but they face an absolutely massive challenge today.

Image source, Huw Evans Picture Agency

Full-back Johnny McNicholl made the most carries (12) and gained the most metres (114) of any player during Wales' defeat against the All Blacks.

The Springboks may not be as well rested as hoped with reports that the fire alarm went off in their team hotel not once, but twice last night.

If South Africa beat Wales by more than 15 points they will leapfrog New Zealand and return to top of the world rankings.

Image source, Huw Evans Picture Agency

Siya Kolisi says South Africa have learnt the lessons of previous defeats as they aim to earn a first victory in Cardiff since 2013.

"There were a couple of things we spoke about and we do know what went wrong. They outsmarted us," said the Springboks captain.

"But we have everybody here so now we have our full-strength team. Our international players are available and they also have theirs, so it's going to be a tough game.

"We've really looked at our past games, we think we have researched a whole lot more this week. We're really excited for that."

Wales have finished their warm-up and are first to head into their dressing room, the crowd give them a huge cheer.

South Africa follow them down the tunnel amid a few boos.

Wayne Pivac accepts Wales go into this game as second favourites, despite the Springboks not winning their last four matches in Cardiff.

• Wales and South Africa have played each other on 36 occasions, the Springboks having won 29 matches to Wales’ six, with a single draw being shared in 1970.

• 12 of the last 14 meetings between Wales and South Africa have been decided by single figure margins, with 10 of those games seeing the sides separated by six points or fewer at the final whistle.

• South Africa won their most recent encounter against Wales (19-16) in the semi-final of the 2019 Rugby World Cup, ending a four-game losing streak against Wales in the process. That run of four straight victories was Wales’ best against the Springboks.

The Principality Stadium doesn't look quite as full as it did last weekend, with an empty seat block here and there, but the atmosphere is no less electric. Let's see if there's a late rush to get seated...

Image source, Huw Evans Picture Agency

Wales centre Jonathan Davies says he has "pretty big boots to fill" as he takes over the captaincy from injured lock Alun Wyn Jones.

The fans are once again out in force in Cardiff despite the soggy conditions.

Image source, Huw Evans Picture Agency

Image source, Huw Evans Picture Agency

Image source, Huw Evans Picture Agency

Image source, Getty Images

South Africa come into this Test full of confidence after pipping New Zealand in a thrilling Rugby Championship finale last month.

There are three changes made to that winning team, with scrum-half Herschel Jantjies coming in for the injured Faf de Klerk.

Damian Willemse replaces Willie le Roux at full-back in what is described as a "rotational switch".

Centre Jesse Kriel moves out to the wing in place of S'bu Nkosi, who South Africa say is yet to travel to the UK as he awaits the necessary paperwork.

Here's the South Africa team in full:

Damian Willemse; Jesse Kriel, Lukhanyo Am, Damian de Allende, Makazole Mapimpi; Handre Pollard, Herschel Jantjies; Ox Nche, Bongi Mbonambi, Trevor Nyakane, Eben Etzebeth, Lood De Jager, Siya Kolisi (capt), Kwagga Smith, Duane Vermeulen.

Replacements: Malcolm Marx, Steven Kitshoff, Vincent Koch, Franco Mostert, Jasper Wiese, Cobus Reinach, Elton Jantjies, Frans Steyn.

Image source, Huw Evans Picture Agency

Wayne Pivac said himself "what a story" as he named Cardiff flanker Ellis Jenkins in his starting XV.

The 28-year-old produced a man-of-the-match display in Wales' 20-11 victory against South Africa in November 2018 before suffering a serious knee injury in the final minute.

He then missed 26 months of action before finally returning for Cardiff in February this year.

Jenkins is one of six starting changes to the side that lost to the All Blacks.

Prop Rhys Carre and lock Will Rowlands are the other recalled forwards, while fly-half Dan Biggar, wing Louis Rees-Zammit and centre Nick Tompkins are included in the backline.

Here's the Wales team in full:

Johnny McNicholl; Louis Rees-Zammit, Jonathan Davies (capt), Nick Tompkins, Josh Adams; Dan Biggar, Tomos Williams; Rhys Carre, Ryan Elias, Tomas Francis, Will Rowlands, Adam Beard, Ellis Jenkins, Taine Basham, Aaron Wainwright.

Replacements: Bradley Roberts, Wyn Jones, WillGriff John, Ben Carter, Seb Davies, Gareth Davies, Gareth Anscombe, Liam Williams.

Image source, Huw Evans Picture Agency

Hello and welcome to the Principality Stadium where Wales take on world champions South Africa in the second of their autumn Tests.

Wayne Pivac's side will be looking to bounce back from last weekend's heavy 54-16 defeat to New Zealand.

They'll be without injured captain Alun Wyn Jones, but the squad is bolstered by the return of the English-based players with this game being inside World Rugby's international window.

While the Springboks are the reigning World Cup winners, it's worth remembering they've not beaten Wales in Cardiff since 2013.

But they do have the bragging rights in the last two World Cups, including in 2019 where they pipped Wales in the semi-final.

Add to that the spice of players wanting revenge from the British and Irish Lions summer tour and we should be in for a great evening's entertainment.