In comes Cameron Green at number three.

Sir Alastair Cook
Ex-England captain on BBC Radio 5 Sports Extra

Great catch! That is a brilliant catch and I know that looks out of the bread basket but that's a difficult one at Lord's.

A really good catch and South Africa needed that breakthrough after starting the bowling well.

@henrymoeranBBC on X: More leaves than Autumn so far from the Australian openers. Easing their way in under cloudy skies.

Sir Alastair Cook
Ex-England captain on BBC Radio 5 Sports Extra

South Africa are desperate for a wicket. I think we can see this is going to be a good wicket to bat on for the first few days but it has to turn late in the game.

Marnus Labuschagne is doing the scoring for Australia, picking up a pair of twos to start Marco Jansen's third over. He's also muttering to himself about movement near the sight screen.

Speaking of movement, Jansen is getting plenty from this pitch. However, a big front-foot no-ball is a disappointing end to the over.

@fenners100 on X: Given the qualification process it feels right that Australia should win this, given they've played everyone in longer series. Whereas South Africa have played easy teams in two-match series, plus they put out a second team in NZ.

Sir Alastair Cook
Ex-England captain on BBC Radio 5 Sports Extra

Kagiso Rabada is looking far more dangerous around the wicket to Usman Khawaja.

Image source, PA Media

18 balls in and Usman Khawaja is yet to get off the mark.

To echo Andy (@10:46), proper cricket.

Image source, PA Media

Marnus Labuschagne has never scored a Test century against South Africa, averaging only 36.33 against them in four Tests compared to a career average of 46.76. The Proteas are the only team he has faced who he hasn't scored a ton against.

Jonathan Agnew
BBC Chief Cricket Commentator on Test Match Special

There's the first runs. Finally, and it certainly wasn't where Labuschagne was intending.

Marnus Labuschagne wears one on his pads from Marco Jansen but the wicketkeeper is the only person interested, jumping up with both arms in the air. Two balls later, he and Australia are up and running with two off a big edge.

There was a no-ball in there somewhere too. Don't ask me which ball. There wasn't much of a signal.

Usman Khawaja is yet to crack a smile. He's leaving quite confidently and stalking around in between deliveries.

Three maidens in a row to start as Kagiso Rabada bowls his second.

Image source, Rex Features

Australia and South Africa are the two touring teams with the most wins in Tests at Lord's - the Aussies winning 18 times at HQ and South Africa six.

Sir Alastair Cook
Ex-England captain on BBC Radio 5 Sports Extra

Marnus Labuschagne did what all openers have to do and play inside that.

Marnus Labuschagne survives his first six balls as an opener in Test cricket.

He plays and misses at the final delivery as Marco Jansen gets the ball to nip away from him. "Ooooohs" in the slips.

Marco Jansen will share the new ball.