Is the game still in the balance? Or is it now a matter of time before Australia wins?

A lot relies on the fitness of Shamar Joseph for me - but that didn't look positive earlier on.

Steve Smith finally looks like his old self out there, and Cameron Green overcame his customary wobble to survive to stumps.

There is a rather ominous forecast tomorrow, but Australia will hope to have enough time to wrap this one up early on.

Thanks for being with us today - myself and Dean will be back tomorrow for what is probably the final day of the Australian men's Test summer!

Until then, goodnight.

Green fends to the leg side but there is no run.

Another wicket here would give the West Indies a huge boost.

Green leaves outside off.

Now he leaves on length. The West Indies will be desperate to put Green under a bit more pressure than this.

Nice drive on the up - punching off the back foot for a single to cover.

Smith gets a single into the leg side, thought about two but stays with one.

Green fends to mid on.

Green drives the ball to mid on, Smith took off for a single and then raced back into his ground in the nick of time. The throw was trash though to be honest.

Tight leave outside off.

Green is hit on the pads - but Roach is instantly gesturing that i was going down leg.

Green drives to mid off, who slightly misfields but is quick to correct his mistake.

Green pushes into the point region for a single and he takes it.

Smith defends.

One more over I think.

Smith takes a single to square leg - nice and easy from the opener.

Green defends.

Green backs away and motions that somebody, somewhere was moving. Greaves goes back and tries again.

BEATEN! Good ball, just past the outside edge of Green's bat.

BEATEN AGAIN! This is the standard Green shakey spell - out of nowhere he misses two balls outside off and is fortunate not to edge either of them. The WA all rounder needs to recover here.

BIG APPEAL! The West Indies love this! It's a touch high on first view... Oh yeah, that's very high. Ball tracking shows the ball is going over the top and it's a good decision from the umpire. The WIndies lose a challenge - they still have to remaining.

DROPPED! Did it carry? It did - dropped on 6 at second slip. Big let off for Green.

He's not been great.

He has had three fifties in his last 12 innings, but only one century since the last time he played against the West Indies in Adelaide last year.

That's a run of 18 Tests.

Green pushes to cover point for a single.

Smith leaves outside off and, for some reason there is some interest from behind the stumps. I guess the bat was a bit close to the ball, lazily held horizontal to the ground.

Smith pulls for a single to square leg for a single.

Wow that was a tight leave, angling back in just over the stumps from Green. Very close to hitting that.

Green fends to backward point. No run.

Green leaves outside off.

That's over.

Smith drives straight to cover - nice shot for no reward.

This time Smith beats the fielder with a near identical shot, he picks up a couple.

This looks far more like vintage Smith to be honest - it's been a chanceless innings so far.

Smith defends high off the bat this time.

Smith ducks under a bouncer - he didn't have to duck much because that flew off the pitch and was taken high over his head by Da Silva.

Outside off, Smith leaves alone.

He defends the last.

Green is forward defending.

Roach got Green in the first innings of this match, spooning the ball to mid off.

Green leaps up to fend a rising ball away into the off side and gets called through for a single.

Smith leaves a couple alone outside off.

Smith pulls the ball away for a single to backward square leg.

Green backs away as Roach runs in - I couldn't see anything moving back there but there you go.

Green defends with a big stride forward.

Green punches the ball past the bowler, who stuck a hand up, couldn't gather it, and calls Joseph into action saving any more than a single from being scored.

Bouncer for Smith, who gets under it. It's called a wide.

Bouncer for Smith again, who gets under it again.

Another bouncer - this one Smith again ducks away from.

Smith fends away into the leg side but there is no run.

Smith swivels and gets his bat out the way as the ball flies through to the keeper.

Given the ambient conditions in Brisbane at the moment, I imagine he is steaming too - it's still so hot even accounting for the lateness of the hour.

Smith takes a single into midwicket first up.

Green leaves outside off.

Green is hit on the body by a rising delivery.

Green clips into the leg side for a single.

Bouncer for Smith to duck under.

Smith drives a full back straight back down the pitch but Joseph fields off his own bowling.

The big Antiguan looks exhausted as he grabs his cap and ambles listlessly to mid on. Like I said earlier, a tremendous feat of endurance from the bowler so far tonight.

The new batter is Cameron Green.

Three slips and a gully in place, two men back on the leg side, mid on and off, point too.

Green is practicing his shots off the pitch and everyone is waiting for him to be ready.

Greaves shows his frustration by bowling a bouncer.

Green clips off his pads into the leg side and they take a couple of runs.

Green wants a run to short midwicket but Greaves hares round to stop the ball and deny the all rounder a single.

Green is rapped on the pads but it was going over the top and there's a minimal appeal if anything.

Marnus can't believe it!

Given the groan that went around the Gabba, I don't think the 11,184 supporters can either.

A thick edge, wonderfully taken at third slip by a diving Sinclair.

Marnus goes for 5.

Australia 2-42.

Marnus gets a couple to square leg.

And, more importantly, is it right?

Marnus, yet to get off the mark, fends into the off side.

Joseph bowled that one at 141kph - great effort in these conditions - it's still 29 degrees, feels like 35 and 83 per cent humidity out there.

The Aussie bowlers were having short spells and then going off for a rest, some ice and to sit inside in the cool for a bit after a three over spell - so this is Herculean from Joseph.

No real protection on the leg side and Marnus runs three clipping off his pads.

Smith pulls hard into the leg side - it was aerial for a long time - and gets a couple. It's a no ball too from Joseph.

Smith defends back down the pitch.

Smith sways away from a bumper nonchalantly to end the over.

Greaves tells the groundstaff he wants the landing area patted down, so out they come.

In he comes and Smith leaves.

FOUR! Lovely stuff from Smith - too slow to bowl that short and Smith gets a boundary pulling through midwicket.

Good take from Da Silva, who is keeping in a wide brimmed floppy hat, dow the leg side, diving as he goes.

Outside off, left alone by Smith.

Down leg side again, Smith shoulders arms and watches the ball down the leg side.

Off the outside edge of Smith's bat to point.

Marnus is the new batter, and he's hit in the thigh.

Marnus leaves outside off, on length too as the ball flies through to the keeper at 141.7kph.

Marnus leaves again on length.

That ball angles in towards Marnus who does really well to just wiggle his hips out the way.

Outside off again from Joseph, swinging away from Marnus.

Another wasted ball outside off.

Here's our answer as to who the first change will be.

Greaves steams in and bowls outside off, Smith leaves alone.

FOUR! Lovely sound off the bat - Smith swivels and pulls that for a boundary to square leg. The pink ball rockets off the bat and away along the ground.

Smith takes two the other way, into the off side with a neat push through cover.

Outside off, left alone.

Smith leaves the next outside off as well.