Image source, Reuters

Somewhat against expectation, we are going to have a day four.

South Africa need 69 runs to win the World Test Championship and have eight wickets in hand.

We'll be back at 10:15 BST on Saturday. In the meantime, you can read Tim Abraham's report from day three at Lord's here.

See you soon!

South Africa batting coach Ashwell Prince speaking on Test Match Special: "At the moment the feeling is great joy, first of all for Aiden's hundred and the partnership with the Temba. The coaches will make sure the guys stick to our processes, stay focused, get the job done. Do whatever you do at night, don't do anything different, come back in the morning and stick to the same processes in terms of warm-ups, preparations. It's a big day, but you don't want to do anything different just because."

On the partnership: "It's massive. At tea-time we had to make a call on Temba and his fitness. Temba was quite adamant he wanted to continue. The coaching staff, we were might concerned that it might affect Aiden and his rhythm as well, if he's not able to run twos, but both of them were adamant that that partnership could be key to the outcome of the match. So replacing Temba at that time might have meant a restart or a new partnership, so if you add all of those things to the equation... it mean, it's right up there in terms of South African history in Test cricket.

"My feeling was that towards the end of play last night, and the passage of play this morning, that there were good signs for us. In terms of the nicks, they started dropping short of the slip cordon yesterday and the relative comfort the Australian tail-enders were batting with this morning. The stats suggest that day three is the best day for batting, and you put all that together, the indication was it might be the best time for batting. If at the start of this Test cycle, people would have said you have 250-240 to go to win the Test championship, Australia dug a bit deeper to make it to 282 to win, I still think you would have fancied your chances, but at the moment the job is not done.

"This would be massive for our country. Both in terms of what we want to do in Test match cricket and what we want to achieve going forward. We've fallen short in some white ball competitions with teams that have had very good chances of getting over the line, possibly favourites at times. But at the moment, history says we haven't done it yet, so we have got to knuckle down.

"There's been quite few South Africans who've come over, some of them staying in our hotel. We were aware before we left home that quite a few of them would be coming over and I think quite a lot of the locals would be supporting South Africa - just the history between England and Australia, and maybe because there was a bit of beef in the last Ashes Test here at Lord's, I think some of the locals might be supporting us as well. It was phenomenal hearing Aiden and Temba's names being sung by the South African fans, but you also got the sense of the rest of the crowd joining in, so it was fun sitting up on the balcony listening to that, I'm sure for them out in the middle. As a batter, you're kind of locked in terms of what you need to be doing, but you can't miss that.

"Not sure how I'm going to sleep tonight - it will be a normal evening, dinner, to bed not too late, just chilled out with the guys. Whether I can fall into a deep sleep, I'm not sure!"

More from Beau Webster on Steve Smith, who dislocated his right little finger during the second session:

"The ball was falling short so we had a lot in the slips and have been ultra close. Steve was really close, we're lucky it didn't hit him in the head.

"It's had a bit of everything, the bowlers have come hard and there's been a lot on the surface. It's been a good day of cricket. I've loved it. I would've liked today to go a little bit better but unfortunately we couldn't get as many chances as we'd like but I've enjoyed it."

Australia all-rounder Beau Webster speaking on Test Match Special:

"When we went out last night it was cloudy, that helped the ball move a bit. Today it was sunny so there was nothing in it but credit to South Africa, they batted really well.

"In the morning we've got to come back and try and form a plan. Credit to them they've batted really well and credit to out boys for being out there all day especially with the soft ball.

"The conditions probably didn't go our way but we'll just have to go out there again tomorrow. The boys will be looking at any advantage we can get tomorrow. Strange things happen in this game so we'll see what happens.

"We tried some new things with the bowling attack but they were just too good in the end and the ball was getting hit around and both of them were chanceless so complete credit to them."

Steven Finn
Former England fast bowler on BBC Radio 5 Sports Extra

It was surprising that only four wickets fell. But when it's sunny the pitches at Lord's are very slow.

Both attacks looked exhausted. To come off bowling four overs in the IPL to get Test match ready, none of the players will have come in match fit and I think the course of the game shows that.

Firdose Moonda
Cricinfo's South Africa correspondent on Test Match Special

Temba Bavuma put on a great display. He's been a superb captain but if he doesn't carry them all the way, he'll feel like he's failed.

Simon Mann
BBC Test Match Special commentator on BBC Radio 5 Sports Extra

It's been a fine innings from Aiden Markram under so much pressure. Temba Bavuma has played brilliantly as well.

Ultimately, South Africa have dominated the day and are on track for the title.

Firdose Moonda
Cricinfo's South Africa correspondent on Test Match Special

Aiden Markram last scored a hundred 16 innings ago. This was a long time coming. Bavuma stood back, let him salute the sky.

Image source, Reuters

South Africa all-rounder Wiaan Mulder speaking on Sky Sports: "We had to go for it whatever they got. There was a lot less fear of failure.

"They're going to bowl you good balls, you have to punish the bad ones. Number three is new for me, hope if I bat with intent I can get a lot more runs."

On Aiden Markram and Temba Bavuma's partnership: "The guys have been through a lot of adversity in the last years, you could see they were pushing themselves out there, two people who put South African cricket first."

However, the undisputed star of the day is Aiden Markram.

After getting a duck in South Africa's first innings, he's leading his side to glory with 102 not out off 159 balls.

Here are the highlights from his innings.

But Aiden Markram and Temba Bavuma have propelled South Africa towards victory, putting on 143 (232) for the third wicket so far.

Captain Bavuma, nursing a hamstring injury, is not out on 65 (121)...

Mitchell Starc then picked up the wickets of Ryan Rickelton and Wiaan Mulder to reduce South Africa to 70-2.

Even though it feels like Markram and Bavuma have been batting all day, Australia actually began day three with bat in hand.

They resumed on 144-8 and pushed on to 207 to set South Africa a target of 282 to win.

Mitchell Starc top-scored with an unbeaten 58.

Don't go anywhere... we'll have plenty of recap and reaction to follow.

Simon Mann
BBC Test Match Special commentator on BBC Radio 5 Sports Extra

What a lovely position for South Africa to be in. There's more work to do tomorrow though.

I wonder what state Temba Bevuma is going to be in tomorrow.

Temba Bavuma and Aiden Markram take three runs off Nathan Lyon's final over of the day.

Markram, unbeaten on 102, receives handshakes all round from Australia.

South Africa are 69 runs away from winning the World Test Championship.

We have time for one more over.

Vic Marks
Former England spinner on BBC Radio 5 Sports Extra

I haven't seen a smile on his face. Aiden Markram is probably really tired, he's just gathering himself for the rest of the day.