Sublime from Kokkinakis. He gets round the forehand and slaps it onto the line.

Andy Murray digs deep. He groans his way across the court and Kokkinakis can only respond by slapping a forehand into the tape.

Wait a minute...

A couple of slip-ups from Kokkinakis and Murray suddenly finds himself 30-0 up on the Australian's serve.

Pat Cash
Former Wimbledon champion on BBC Radio 5 Sports Extra

For the first time a bit of poor footwork there for Murray.

This is the thing about playing five-set matches at the Grand Slams - you have to take it one game at a time.

Not surprising after his previous match that he is struggling a little bit.

Murray has a good chat with himself, can he berate himself back into this third (and possibly final) set?

It's not looking good for the former world number one.

He hits the ball long for the second point in a row and Kokkinakis gets his break.

You have to think Murray has at least one more fightback in him, because he always does, but it's not come yet in this service game.

Andy Murray has not reached the third round of the Australian Open for six years and the way Thanasi Kokkinakis is playing that wait will continue.

The Australian looks firmly in control as he finds the lines to go 30-0 up on Murray's serve.

Kokkinakis wins the first point of the third set with some nice, controlled play. Murray levels off the forehand but Kokkinakis plays a scorcher of a forehand winner of his own in answer.

He looks bewildered, though, as he gifts Murray the next point, before a sweet drop shot leaves Murray sprinting towards a ball that has already beaten him.

The Aussie holds the opening game with a serve that Murray fails to return.

Pat Cash
Former Wimbledon champion on BBC Radio 5 Sports Extra

it is a big ask for Andy Murray to come back from two sets down. Kokkinakis will have to lose his concentration, and he probably could.

Let's see what Kokkinakis is made of. It's a new experience for him but the way he's playing...

What will Andy Murray's response be?

It's 12:30am in Melbourne but even at that hour, you can never, ever, rule that man out.

David Law
Commentator on BBC Radio 5 Sports Extra

Murray just looks as though he doesn't have the answers tonight, especially against a guy playing like this.

This situation is going to be beyond him, isn't it?

Ace down the middle.

That was brave after a second fault - and it pays off.

As at the end of the first set, the Australian leaves the court straight away. Murray goes too. It's a long way back from two sets down.

Double fault from Kokkinakis! That's another one gone. 6-4.

Kokkinakis is caught off-balance as Murray pins him back. Still plenty more set points at 6-3, though.

David Law
Commentator on BBC Radio 5 Sports Extra

You have to hand it to Kokkinakis. He was put under all sorts of pressure and he came up with a destructive forehand to put it away.

Jonathan Jurejko
BBC Sport at Melbourne Park

Kokkinakis does that old Djokovic celebration of pointing the finger to the temple after whacking away another forehand winner.

It's all in the mind, folks.

Murray waits way behind the baseline. He knows the big forehand is coming. The Brit gets a couple back but it feels like it is only a matter of time before one goes past him and Kokkinakis makes no mistake. 5-2.

Murray brings his opponent to the net, but it's not the right shot this time. Set point Kokkinakis.

Any signs of nerves from Kokkinakis have disappeared. He coolly bats a volley out of Murray's reach to go 4-2 up.

Three points away from taking a two-set lead, but Murray has come out swinging once before in this set.

Murray bites back. His ball bounces off the net to bring Kokkinakis forwards, before he bats it past his opponent. The Brit wins the next point too to keep himself in this tie-break at 3-2.