What would be the best ball to bowl to Steve Smith? Golf? Yoga? Hockey?He'd score 100 off anything at the moment I reckon.

Glenn McGrath
Ex-Australia pace bowler on BBC Test Match Special

Overton has looked the most dangerous England bowler. He's found the length that works on this pitch.

Steve Smith has a laugh with Craig Overton as the England man gets one to leap up off a length, sort of glove/handle height.

There's no danger of a wicket or anything but in the context of this innings that's almost a crisis for the Aussie skipper.

Nine overs until the new ball. Can we have a bowling ball please?

Andrew Samson
BBC Test Match Special statistician

That boundary has brought up 1,000 Test runs this year for Steve Smith. It's the fourth consecutive year that he's achieved that milestone. The only other player to do the same is Matthew Hayden.

Harry Gasper‏: Steve Smith has led this Australia team from the front all series. Both with his attitude in the field and of course his magnificently beguiling batting. This will be his Ashes.

Chris Woakes is handed the ball now, a thankless task at the moment. England still have a healthy lead, I know it doesn't feel like it. Shot! That's the best shot from Steve Smith for ages, a touch of class and flair as he blazes square on the off side.

The middle of his bat is about four foot wide.

Andrew Samson
BBC Test Match Special statistician

The fifty partnership came up from 113 balls with six fours.

Lovely shot that, Shaun Marsh comes to the party, working Craig Overton to the fence for four.

Overton gets a bit of wobble into the left hander, he makes more of this surface than any England bowler for my money.

He then bowls straight at Steve Smith, who takes the single on offer.

It's so easy, easy...

A new topic for you all then:

Things to happen before England dismiss Steve Smith

We're thinking Burnley playing in the Champions League, Star Wars Episode IX will be in the cinemas, Brexit may be sorte...maybe not

We need to have a rule where Steve Smith has to retire at a certain score just to even it up. He just accumulates runs at an incessant pace. Chanceless.

Scary stuff

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It's worth remembering, if you're feeling glum, that England looked as comfortable as this 24 hours ago with Dawid Malan and Jonny Bairstow at the crease.

No honestly! There didn't appear to be any danger at all until Malan chipped the spinner to point.

Could the Aussies collapse like an MFI coffee table though?

Image source, Opta

Where do you bowl to Steve Smith?

Genuinely if you've any ideas give the lads in Perth a call.

Graeme Swann
Ex-England spinner on BBC Radio 5 live

You want to get Steve Smith to try and play around his front pad. If the wicket isn't doing anything, you try and get someone to play across the line, and play with half the bat.

Andrew Samson
BBC Test Match Special statistician

This is Steve Smith's 22nd Test century, and his seventh against England. It's his third at the Waca, and it is his quickest as well, coming up from 138 balls.

Steve Smith scores a century in 20% of his Test innings. That's pretty remarkable really.

He's only 28 - England could have another three or four Ashes series watching him cart the ball to the fence.

Graeme Swann
Ex-England spinner on BBC Radio 5 live

Smith has been helped enormously by England's tactics but you can't take it away from him. He doesn't miss the bad balls.

Simon Mann
BBC Test Match Special commentator

That has felt almost inevitable since early on in his innings. He has played superbly. He is leading from the front in this series. He's edging Australia closer to the Ashes.

100 for Smith!published at 02:49 Greenwich Mean Time 16 December 2017

02:49 GMT 16 December 2017

If you're looking for sympathy at waiting times for a boat trip in Bali, you're in the wrong place Daz.

There's the hundred! James Anderson bowls on leg stump and Steve Smith gets the full value for it. Clipped for four, he whips the helmet off and takes the acclaim of the Waca crowd. He's just getting started isn't he?

Image source, Getty Images