Australia won by 120 runs
Australia lead 2-0 in five-Test series
England lose six wickets in session
Starc 5-88, Lyon 2-45
Root fails to add to overnight 67
Michael Vaughan
Ex-England captain on BBC Test Match Special
If Joe Root leads England to victory with an unbeaten 150 or more then I'll expect them to erect a statue here next to Clem Hill. I'll chisel it myself.
Australia bowler Pat Cummins, speaking to ABC: "It's a lot better going to sleep overnight knowing they're four down and we're only a couple away from their batsmen, as opposed to three down. Every wicket is going to be huge.
On Australia's tactics: "I think you always look back and wonder what you could have done differently. We were all pretty comfortable with the follow-on call Smith made. As it turned out, they bowled really well.
On using all their reviews: "The DRS has been a bit all over the place this game in terms of a couple of lbw's going over and a few pitching outside the line. There's been a lot of 50-50 calls."
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The TV has just shown a close-up of the pitch. There's one or two chunks of pink ball stuck in the pitch, and Australia did get the ball to reverse swing last night. There's some tasty looking rough too for Nathan Lyon to get stuck in with. Pat Cummins was Australia's most impressive quick yesterday, and his spell at the end of the day under the lights was superb.
Aggers has been out to check on the pitch before play...
Image source, BBC SportBBC Weather's Peter Sloss: "The weather will not get in the way of the excitement today. There will again be uninterrupted play with sunny spells and just a light southerly breeze. It will continue to warm up, temperatures of 24C this afternoon dropping to 18C if play goes on during the evening."
BBC Radio 5 live sports extra
There's no-one better than Test Match Special to take you through a day like today.
You can listen in using the player at the top of the page, and make your early morning commute more enjoyable with our TMS podcasts. Enjoy!
England have already had their traditional game of warm-up football, and Trevor Bayliss has given them a talking-to. They all look quite calm. It's beautiful weather in Adelaide, bright blue skies above the ground. In fact Joe Root gives the TV cameras a big grin as he wanders past Moeen Ali, who is currently being interviewed. In the Australia camp, Steve Smith is turning his arm over with a few practice deliveries.
Jonathan Agnew
BBC cricket correspondent on Test Match Special
I have found England's fightback in the second Ashes Test as enjoyable and as intense as I have found it frustrating. They have only fired in the second half of the match.
If they had played like they have since halfway through day three, from the moment that Joe Root sent Australia into bat on Saturday, who knows where they would be?
The way they bowled and then the way the top order batted in the first innings has meant that they have had to come from behind.
If England had batted anything like they should have done, they would be 100 runs closer to their target.
England have all day to get these runs. They need patience. They need do nothing more than bat sensibly.
Here's what Stuart Broad had to say last night...
Image source, TwitterAnd this was Greg James' response...
Image source, TwitterAnd here is yesterday's play in picture and excitable audio format...
Pint-sized Ashes: Best TMS moments as Root gives England hope
This is the best things have looked all match for England on our momentum-o-meter...
Image source, BBC SportIf you were one of the few people who didn't stop working yesterday to watch the cricket, then you're a better person than I.
Luckily, Stephan Shemlit has a comprehensive report of a thoroughly entertaining fourth day in Adelaide for you to catch up with.
Good morning! Early, isn't it? This is set up to be a thoroughly entertaining day. England will resume on 176-4, wih Joe Root unbeaten on 67, to try and register a historic victory. They require their highest fourth-innings chase in Test, and better a record they haven't broken since 1928.
Feeling confident? Let us know your thoughts, and where you're following from, using #bbccricket on Twitter, text 81111 or email tms@bbc.co.uk
178 more runs to win. Six wickets in hand. History, and all cricketing logic, is against England.
And yet, here we are...
Image source, Reuters