Wow.

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Are there any other Marsh siblings who fancy a bat in Sydney?

That 'w' word may be on the agenda heavily for the next few weeks...

Steve Smith has scored 369 runs in this series, and counting. He's been dismissed twice.

Stephan Shemilt
BBC Sport in Perth

Clouds. Not often spotted in these parts. There are rumours of rain tomorrow and Monday.

Image source, BBC Sport

Australia are 218-1 today. My word.

England's bowlers are already exhausted. This pitch is flat. They're going to come out after tea to two set batsmen, an old ball and an increasingly vocal home crowd.

What I'm saying is, prepare yourself for more runs. Plenty of them.

Image source, Getty Images

That, folks, is tea.

Mitch Marsh and Steve Smith wander back in to a standing ovation. There's a huge grin on Marsh's face, and why not? His selection was questioned and criticised and now, in front of his family and his home crowd, he's made his first Test century.

England, by contrast, look done.

It's been a difficult few months for Marsh. He's undergone shoulder surgery, which has limited his ability to bowl, and as a result he's focused more on his batting.

He takes some time to refocus himself before defending the rest of Stuart Broad's over.

Andrew Samson
BBC Test Match Special statistician

Shaun Marsh was the 100th Australian to score a hundred against England, Mitchell Marsh is now the 101st.

Image source, PA

100 for Mitchell Marshpublished at 114.3 overs

114.3 overs

There it is! A maiden Test century for Mitch Marsh!

A huge celebration from Marsh as he crashes another boundary before raising his arms to the crowd. He waves his bat and helmet first at teh crowd and then at the dressing room, as the Waca rises as one.

Big brother Shaun Marsh is on his feet, grinning and clapping furiously, as is dad Geoff in the stands. What a moment.

Image source, PA

Four! Mitch Marsh cuts, and cuts hard, smacking Broad to the boundary. Broad turns round and swings his foot in annoyance.

Image source, .

Things ain't cooking, in England's kitchen.

Maybe the rain will save them? Here's the current forecast for Sunday. A bit of rain looks likely - but it's showers.

Moeen's back on. I've just caught myself wondering if Steve Smith is tiring. Then I watched him, having been at the crease for 416 minutes, wander down to Moeen, whip his wrists and run a quick two. So no, he isn't.

He punches gloves with Marsh after seeing out the over. There are just five minutes until tea.

Steve Smith has edged more balls in the past 40 minutes or so than he has at any other point in this match. And every time, the ball has bounced just before it's got to Alastair Cook at slip. Smith wanders off to short leg and blinks furiously, before he pats away the rest of Stuart Broad's over.

A chirpy Mitch Johnson, meanwhile, has just been asked to describe Mitch Marsh. He's opted for "he's like a giant teddy bear".

Stephan Shemilt
BBC Sport in Perth

Image source, BBC Sport

Those shades.

Mark Stoneman is just strapping the short leg pads on. An ideal position to be sent to stand in after 112 overs in the field.

That's Mitch Marsh's highest Test score and it comes in emphatic fashion, another furious drive straight back down the ground. He nailed that, all high elbows and stillness at the crease.

Marsh throws everything but the kitchen sink into a cover drive, but a good tumble stops it running to the boundary.