Image source, Getty Images

Herschelle Gibbs on his 111-ball 175 against Australia: "It was my most enjoyable one-day innings. You could play with freedom. 

"It was a phenomenal game to be part of - it had everything. Nathan Bracken got a five-for in that game - no one remembers."

Herschelle Gibbs is recalling South Africa's record 438-9, external to beat Australia in an ODI at the Wanderers in 2006. His contribution: 175 off 111 balls.

Former South Africa batsman Herschelle Gibbs: "Full marks to the curator. It's his first Test and he's produced an absolute belter of a pitch. It's intriguing and it's Test match cricket at its best."

South Africa 313 & 16-0

Batsmen: Elgar 10*, Van Zyl 6*

Bowling figures: Anderson 3-1-7-0, Broad 2-0-9-0

England 323: Root 110, Bairstow 45; Rabada 5-78, Morkel 3-76

South Africa lead by 6 runs

Full scorecard

Michael Vaughan
Ex-England captain on BBC Test Match Special

"England will be desperate for the clouds to stick around. I'm in South Africa's camp at the moment. I'd rather than the six-run lead with 10 wickets in hand. But the momentum can shift."

The physios are banished back to the dressing-room and Elgar grits his teeth and continues. He sees off the final three deliveries of Anderson's over, and South Africa have survived through to lunch.

SA 16-0published at 4.3 overs

4.3 overs

Wow, that's a rozzer from Anderson. Back of a length, climbing faster than a cat-burglar up a drainpipe and swinging wildly away from the batsman. And another jaffa from the England quick, spitting off the surface and rapping Elgar on the shoulder. Elgar's a tough sort but even he's going to need a bit of magic sponge here.

Elgar swings hard at a short ball and slices it over the top of the slips for four. Is this a bit short from England? We haven't seen too many forward defensive strokes so far.

Michael Vaughan
Ex-England captain on BBC Test Match Special

"I'd turn to Steven Finn now, replacing Anderson. He's been the pick of the bowlers all tour."

Image source, AP

Good contest this. Two thoroughbred pace bowlers steaming in, the series potentially on the line for South Africa in the next couple of hours. These two batsmen hoping to make it through to lunch unscathed by whatever means necessary. Van Zyl squirts a couple behind square on the leg side and South Africa are back in the lead again.

Michael Vaughan
Ex-England captain on BBC Test Match Special

"England have got the bit between the teeth. This pair are running in better than they did on the first morning."  

Yeesh! Broad gets one to spit venomously off the surface and Elgar only just withdraws his gloves in the nick of time. Another one takes off sharply from a length and clangs Jonny Bairstow on the sternum. Elgar responds well with a flashing stroke over backward point for four.

Immediately there's a bit of shape on offer for Jimmy and he induces an edge from Dean Elgar which goes down and scuttles between the slips for a single. Van Zyl gets off the mark with a nice square-drive which runs away for four.

Geoffrey Boycott
Ex-England batsman on BBC Test Match Special

"If South Africa bat really well, they put the pressure back on England. The Test will be won or lost this afternoon."

Image source, Getty Images

Gareth Axenderrie: What a finely poised Test... Any lead now a good 1.. On a good fair track, Test Cricket still trumps all formats of the game!!

Paul Lewis: England have thrown away a really good position this morning. South Africa have to be favourites to win now.

Van Zyl and Dean Elgar are out in the middle. Jimmy Anderson with the new conker. Can he get it hooping? (The lights are on.) Let's see.