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NOW: Andy Murray wins 4-6 6-7 (4-7) 7-6 (7-5) 6-3 7-5 against Thanasi Kokkinakis in Australian Open second round
Novak Djokovic beats Enzo Couacaud 6-1 6-7 (5-7) 6-2 6-0 to reach third round
Djokovic had medical timeout in second set as hamstring issue seems to be troubling him
GB's Dan Evans beats Jeremy Chardy in straight sets to reach third round
Men's second seed Casper Ruud and women's second seed Ons Jabeur are knocked out
Joe Salisbury, Neal Skupski and Jamie Murray among Britons to advance in doubles
*Murray 4-6 6-7 (4-7) 2-3 Kokkinakis
Uh oh. Murray hits a forehand long and it puts him 0-30 down on his serve.
The slightest of errors here could be the end of the match given he's already two sets down.
*Murray 4-6 6-7 (4-7) 2-3 Kokkinakis
Pat Cash
Former Wimbledon champion on BBC Radio 5 Sports Extra
You have to give Kokkinakis credit there - he played some big points in that game.
*Murray 4-6 6-7 (4-7) 2-3 Kokkinakis
"No!" screams Murray as an ace whips past him.
Kokkinakis edges ahead again.
Murray 4-6 6-7 (4-7) 2-2 Kokkinakis*
Murray's turn to get frustrated. He swings his racquet at the floor as Kokkinakis goes 40-30 up.
The Brit is handed a lifeline as Kokkinakis slips behind the baseline and can't get to Murray's drop-shot. Deuce.
Murray 4-6 6-7 (4-7) 2-2 Kokkinakis*
Murray cannot miss... but neither can Kokkinakis. The five-time Australian Open finalist looks like he's finished off the point so many times but it is actually his opponent who hits the winner to bring up 30-30.
Murray 4-6 6-7 (4-7) 2-2 Kokkinakis*
Kokkinakis getting riled up by the umpire's call a couple of games ago seems to have worked in Murray's favour.
The former world number one is feeding off the crowd and trying to get under the Australian's skin.
It's working, too. Kokkinakis' forehand lands long and puts Murray 30-15 up on the 26-year-old's serve.
Murray 4-6 6-7 (4-7) 2-2 Kokkinakis*
This is spicy now.
Murray cools things off a tad with an excellent service game, holding to love with an ace.
Hope everyone has sufficient snacks in case this goes to five sets.
Jonathan Jurejko
BBC Sport at Melbourne Park
Have you ever seen anything like it?! Incredible!!
Murray somehow - don't ask me how - stops four overheads in a row and eventually wins the point.
It is going off in Margaret Court Arena!!
"I can't hear you!" shouts Murray with the noise of a rock concert ringing in his ears.
*Murray 4-6 6-7 (4-7) 1-2 Kokkinakis
Murray is using the change of ends to give his two cents to the umpire too, complaining that Kokkinakis was repeatedly swearing during his rant in that last game.
Anyway, on with the tennis. Murray will try to serve his way back into this set.
*Murray 4-6 6-7 (4-7) 1-2 Kokkinakis
Pat Cash
Former Wimbledon champion on BBC Radio 5 Sports Extra
Kokkinakis demolishes his racquet in the middle of the court. Furious - and he's going to get a warning for that.
The time violation just rattled him.
*Murray 4-6 6-7 (4-7) 1-2 Kokkinakis
What just happened?!
You can hear how much Murray is straining to get to each ball as the volume, and duration, of his grunts get louder and louder.
He had absolutely no right to get to any of them, but get to them he does.
And somehow it works. Kokkinakis hits the ball into the net, then smashes his racquet on the ground.
Murray meanwhile, is gesturing to the wildly baying crowd as if he can't hear them.
Code violation for Kokkinakis, break for Murray. And the Australian is checking in with the referee.
Jonathan Jurejko
BBC Sport at Melbourne Park
Murray is just sitting back and enjoying the show. Exactly what he wants to see.
Kokkinakis is feeling the pressure - even though is making a very good point over what seemed a very harsh call.
Needs to move on.
Vondrousova 6-1 5-7 3-0 Jabeur
Another upset on the cards?
Over on Rod Laver Arena, world number two Ons Jabeur has been immediately broken - not once, but twice - in the deciding set by Marketa Vondrousova.
Murray 4-6 6-7 (4-7) 0-2 Kokkinakis*
Murray seems undisturbed by the break in play and hits the ball at Kokkinakis' feet, just on the baseline.
Another chance for the Brit.
Murray 4-6 6-7 (4-7) 0-2 Kokkinakis*
Pat Cash
Former Wimbledon champion on BBC Radio 5 Sports Extra
This is an umpire going strictly by the rules. No leeway whatsoever. Kokkinakis needs to just forget about it. It's ok kid.
Murray 4-6 6-7 (4-7) 0-2 Kokkinakis*
Kokkinakis yet again fails to close out the game. The umpire gives him a time violation and it seems to have lit a fire in the Australian, who launches into a barrage of abuse.
He's frustrated because he says he was taking his time over the serve after noise from the crowd, but it's not a pretty sight.
Murray 4-6 6-7 (4-7) 0-2 Kokkinakis*
An ace down the middle... then a backhand into the net. Kokkinakis still hasn't quite closed out his service game and we're back at deuce.
It's approaching 1am in Melbourne and the umpire is repeatedly having to ask the raucous crowd to calm down.
Vondrousova 6-1 5-7 Jabeur*
World number two Ons Jabeur's frown is being turned upside down.
She comes out on the winning end of a topsy-turvy second set against former French Open finalist Marketa Vondrousova - and they head into a decider.
Murray 4-6 6-7 (4-7) 0-2 Kokkinakis*
What a drop-shot. Exactly what the Australian needed to quash Murray's challenge.
Murray 4-6 6-7 (4-7) 0-2 Kokkinakis*
Murray cannot afford this. He is pinned into the corner and can't get his forehand over the net.
One break point left. It feels like any chance he has in this match could be riding on this.