Good morning, all, and welcome to our LIVE coverage of the second Australian Open men's semi-final - Novak Djokovic v Stan Wawrinka.

So it's Djokovic v Murray on Sunday morning. Who's your tip? Join us then. Thanks for your company this morning.

Djokovic is thrilled to be through to the final again, as well he might be - he's never lost an Australian Open final.

DJOKOVIC 7-6 3-6 6-4 4-6 6-0 WAWRINKA: Game, set and match, and I suppose breaking Wawrinka and bageling him in the final set is a fitting way to do it after such a rollercoaster of a match.

By my calculations, that's 112 unforced errors between them so far in this match - and just 62 winners.

DJOKOVIC 7-6 3-6 6-4 4-6 5-0 WAWRINKA: Wawrinka is looking sluggish - those high-energy rallies must be draining. And then he finds enough in the tank for another of those whip-smart backhands down the line, which evades Djokovic, and swaps deuce and advantage three times over before the world number one holds.

DJOKOVIC 7-6 3-6 6-4 4-6 4-0 WAWRINKA: It's fascinating to see the tiniest of margins on which HawkEye operates. Djokovic challenges a call and is proved wrong by about half a millimetre, if that, and it gives Wawrinka impetus for a couple of points before he completely loses his game again. It's Djokovic at a canter now.

Wawrinka is coughing at the side of the court. Maybe I was right three hours ago when I thought he had hayfever.

DJOKOVIC 7-6 3-6 6-4 4-6 3-0 WAWRINKA: Djokovic is fearless, approaching the net and powering past Wawrinka who's looking timid with a series of lobs. Boris Becker, looking slightly happier than he did an hour or so ago, gets up to stretch his legs as his player has a seat.

DJOKOVIC 7-6 3-6 6-4 4-6 2-0 WAWRINKA: And another early break in the set for Djokovic! Wawrinka's backhand is beginning to weaken and he has lost that sparkle that was starting to emanate in that fourth.

Word is that there have been seven correct challenges so far in this match - a record.

DJOKOVIC 7-6 3-6 6-4 4-6 1-0 WAWRINKA: Well, after a match characterised by speedy games, this one was almost a comparative epic, with challenges, glaring, seething at the umpire, and finally a hold for Djokovic. The match officials aren't having a great evening, much like the players, if we're honest.

DJOKOVIC 7-6 3-6 6-4 4-6 WAWRINKA: We're into a deciding set then! This has been a very strange fourth, with momentum in both directions, and neither able to sustain it. I suppose you'd have to tip Wawrinka as looking the stronger at the moment. Maybe? Would you? Who can say - this is an incredibly unpredictable tennis match.

DJOKOVIC 7-6 3-6 6-4 4-5 WAWRINKA: Well, that was certainly better from Djokovic, but Wawrinka now has the opportunity to serve out the set. If he can retain the power he was showing just a few minutes ago, we're going to a fifth.

It's been a match of mistakes and mediocrity, but it's certainly intriguing.

DJOKOVIC 7-6 3-6 6-4 3-5 WAWRINKA: Djokovic is playing terribly now. Wawrinka holds, and who wouldn't see him breaking in the next game to take this to a fifth?

A terrible game from Djokovic there. Absolutely hideous forehand.

DJOKOVIC 7-6 3-6 6-4 3-4 WAWRINKA: But - he can't! Three break points for Wawrinka, and he manages it to love! What a topsy-turvy ridiculous tennis match this is.

DJOKOVIC 7-6 3-6 6-4 3-3 WAWRINKA: Hang on. Wawrinka looks like he's super-charged again. He's certainly picked up his service game and Djokovic now needs to match this.

DJOKOVIC 7-6 3-6 6-4 3-2 WAWRINKA: Wawrinka is so frustrated with himself. Djokovic is by no means holding majestically, but Wawrinka is just choosing the wrong shot time and time again.

DJOKOVIC 7-6 3-6 6-4 2-2 WAWRINKA: There's rowdiness in the Rod Laver stands as Wawrinka manages to give himself a glimmer of hope - love-40 down, he gets back to deuce and holds. 22 minutes gone in the fourth set, and two games all.