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A little bit of chat on Test Match Special about whether Australia should have picked Nathan Lyon, and whether they will come to regret that decision.

Lyon himself said he felt "absolutely filthy" after being left out of side for the first time in a home Test since 2012.

Srinivas Vijaykumar
CricViz analyst

Joe Root across his Test career has been not out on five occasions at the end of the innings when the team has been bowled out.

On four of these five occasions, he's ended up with a century.

• 26* v Australia, Brisbane (2013) (4th innings, 179 all out)
• 154* v India, Nottingham (2014) (2nd innings, 496 all out)
• 149* v India, The Oval (2014) (2nd innings, 486 all out)
• 182* v West Indies, St. George's (2015) (2nd innings, 464 all out)
• 138* v Australia, Brisbane (Today) (1st innings, 334 all out)

Andy Zaltzman
Test Match Special statistician

The partnership of Joe Root and Jofra Archer was 70 in 9.4 overs, England's highest ten wickets stand in Australia since 1951. Archer's knock is the highest by a number 11 since 1903.

Phil Tufnell
Former England spinner on BBC Test Match Special

You'll take that partnership. Joe Root, what a great knock but he has had better performances against better attacks.

Jonathan Agnew
BBC Chief Cricket Commentator on Test Match Special

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Marnus Labuschagne has such good hands. That was hit hard by Jofra Archer, it went quickly and he's pulled off a really good catch indeed there. With the pink ball it's usually quite hard to see but Labuschagne, dived full length to take a really good catch.

Joe Root, an outstanding innings. He stands head and shoulders above all the other batters.

Srinivas Vijaykumar
CricViz analyst

WinViz by phases on day one

• Before start of play: England 48% Australia 50% Draw 2%
• After Pope's wicket: England 38% Australia 61% Draw 1%
• End of session one: England 54% Australia 44% Draw 2%
• End of session two : England 60% Australia 37% Draw 3%
• At stumps: England 66% Australia 30% Draw 4%

The match started on even parity before the start of play, dropping quickly to 38% after Ollie Pope's wicket at 5-2. England's WinViz after the Pope dismissal did not drop further, moving from a position of strength with each passing session spearheaded by the 117 (152) partnership by Root and Crawley.

Andy Zaltzman
Test Match Special statistician

This partnership is now at 69 which is the highest 10 wicket partnership in an Ashes since the 1951 series.

Jonathan Agnew
BBC Chief Cricket Commentator on Test Match Special

This is a question of who's patience gives in first here.

There's a bit of a waft from Jofra Archer following that boundary as Mitchell Starc teases something a little wider

However, the England no.11 defends and leaves the remainder of the over.

The Barmy Army are revelling in this last-wicket partnership.

Jonathan Agnew
BBC Chief Cricket Commentator on Test Match Special

Archer is a better player than we've seen with the bat.

This will silence a few Australians.

Andy Zaltzman
Test Match Special statistician

Jofra Archer's domestic first class cricket average is over 30.

Mitchell Starc is next up.

Full and straight to Jofra Archer whose stout defensive shot gets a cheer from the England fans.

Starc's next delivery is a crunching square drive through the covers for four from Archer. Top-order batter stuff.

Jonathan Agnew
BBC Chief Cricket Commentator on Test Match Special

Only six overs to go until the new ball, you'd start with Mitchell Starc.

Another single apiece for Jofra Archer and Joe Root - both worked to the leg side - sees four runs added to England's total after the first over of the day at the Gabba.

Phil Tufnell
Former England spinner on BBC Test Match Special

We all know how infuriating it can be when there's two guys just hanging in there. It just gets under your skin.

Jofra Archer just can't give it away here. Keep them out in the hot sunshine for as long as you can.

Joe Root steers Brendan Doggett round the corner for one as the last strains of Jerusalem are belted out by the England fans.

A couple of balls later and Jofra Archer picks up his first runs with a wristy pull for a single.

Glenn McGrath
Ex-Australia bowler on BBC Test Match Special

I was surprised that they only left three millimetres on the field. The pink ball, once it gets soft it does nothing. Watching that last hour or so when Archer was out there, there was no demons in that pitch I think they could've varied the pace more.

Right, Joe Root has just taken guard at the Gabba.

Brendan Doggett has the pink ball in hand and is at the top of his mark limbering up.

Let's go.

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Joe Root's parents Helen and Matt have been chatting to TNT Sports about their son's first Test century in Australia.

Helen Root: "Everybody has been talking about his monkey on his back. All he will care about is if England win the Test match. He just loved playing cricket from a young age. Exactly what you see is what you get from Joe."

Matt Root: "I was pretty nervous when Mitchell Starc was swinging it about and England were 5-2 and then again when Joe got into the nineties.

"If we can make another 30 runs today and followed by early wickets it would put us in a good position. It's Joe's fourth series here and he is yet to win a Test match. It would be great to go to Adelaide 1-1."