Pat Cash
1987 Wimbledon champion on BBC Radio 5 live sports extra

"Andy Murray has good touch and control but there he hit three of the worst drop-shots he's hit in his life. They were too floaty. Murray wags his finger at himself, he knows it was the wrong shot."

Kyrgios raises his arms in the air and asks himself "What was that?" - or something along those lines - after dumping a tame forehand into the net.

It gives Murray a sniff of a chance at 30-30, but Kyrgios reads the next two points really well and finishes the game with a forehand winner that leaves Murray shaking his head in disappointment.

Andrew Murfin, Isle of Man, via text: Murray is far more controlled than Kyrgios. For all his hustle and bustle the Aussie will blow himself out. Expect a close second set then 6-1 in the third and final set.

Image source, EPA

Murray uses his serve out wide time and time again to drag Kyrgios out of court and is rewarded with a service hold to love. Pressure back on Kyrgios.

Pat Cash
1987 Wimbledon champion on BBC Radio 5 live sports extra

"Kyrgios has settled into the match, cutting out the unforced errors in this second set. His game plan is just starting to come together, pushing Murray about at the back of the court, working his opponent to hit the short ball and then find the winner."

Good stuff from Kyrgios in this game, the Australian's forehand starting to look a lot more potent. His serve is more consistent, too, and he takes some pressure off with an easy service hold. This set is a lot closer, that's for sure, but I'd say Murray still has the momentum.

Richie Macca:, external Murray needs to show some class and just usher Kyrgios out of the tournament without a peep. Silence the crowd.

Hope for Kyrgios - and indeed the crowd - as he takes the first point on the Murray serve. And even more hope when he forces 30-30, to the delight of an Australian sextet who chant the 19-year-old's name.

But the chance disappears within seconds as Murray flies through the next two points to seal the game. A few minor chances for Kyrgios, but still no break points.

Pat Cash
1987 Wimbledon champion on BBC Radio 5 live sports extra

"Andy Murray is fit - that's the main thing for him going into 2015. He's in good shape and I think this will be a good year for him. I wouldn't be surprised if we see him lifting the Australian Open trophy in a few days' time."

Image source, EPA

Danger for Kyrgios who finds himself staring down the barrel of 0-30. The Australian's serve comes to his rescue, two aces helping him to game point before Murray forces deuce and then gets his first break point of the set with a crunching backhand winner.

Kyrgios hits a forehand winner on the next but Murray challenges it. It's in! The crowd love it. We're back to deuce. And deuce again. And a third deuce. It's nip-and-tuck. Murray countering everything Kyrgios has to offer.

But the Australian summons some resolve and powers through to seal the game. Boy, it's hard going on his serve.

Gary Devine, via text: Murray to win in three - physically and mentally too strong for Kyrgios.

"Come on," roars Kyrgios, the Australian starting to get more animated as he reaps the rewards for attacking a Murray second serve.

Murray hauls it back to 30-15 and that's followed by a terrific exchange at the net, the pair trading drop shots and volleys before Murray gets one past Kyrgios.

The Australian bravely chases it down, but frames it high into the crowd. And what a catch by one of the spectators! Kyrgios manages a smile, but seconds later, the game is lost and Murray is level.

Image source, Getty Images

Kyrgios has come out fighting, the Australian looking looser and freer with his shots and it's paying off. The 19-year-old blitzes to a 40-0 lead, including knocking a volley from the back of court back in play for a winner despite the ball looking like it was going out.

Murray snatches the next two points, but Kyrgios' serve comes to the rescue to clinch the game. Kyrgios roars with satisfaction. The crowd respond. You feel the Australian needs to get more involved in this match and take advantage of the home support.

Sebastian Jenkins:, external Murray looks the part again on court. He looks like the next Australian Open champion to me.

Alan Peevers:, external I think Berdych will beat Murray. He's on fire and he has a new coach who knows everything about Andy.

Pat Cash
1987 Wimbledon champion on BBC Radio 5 live sports extra

"The feet haven't been moving for Kyrgios yet, he's made way too many unforced errors. Now he needs to come out swinging, get a break, get the crowd excited.

"Murray's job is to keep putting the ball deep and say 'come on young fella, this is a different match against me at a Grand Slam'.

"Kyrgios hasn't really beaten anyone good yet - and certainly not anyone who is anywhere near as good as Andy Murray."

Piers Newbery
BBC Sport at Melbourne Park

"An audible obscenity, gesturing at the ball kids, a few flashing winners... plenty of the trademark Kyrgios features on show but he doesn't carry quite the same swagger as he's being clinically dismantled on a cold and blustery evening. Murray has quietened the crowd, a classic away tie performance."

Image source, Getty Images

The Rod Laver Arena's PA system blasts out a bit of cheesy pop as the players have a breather - but it isn't one of the hits sung by this man. Underneath the black baseball cap and sunglasses - that classic celebrity disguise - is One Direction heart-throb Niall Horan.

This match is only going in One Direction - in the way of Andy Murray....

Murray breezes through another service game for the loss of just a single point to seal the game as Kyrgios bounces his racquet on the ground in frustration.

Pat Cash
1987 Wimbledon champion on BBC Radio 5 live sports extra

"Kyrgios has got a great ability to hang in there on serve in big matches, saving set points. Now the pressure is back on Murray."

Kyrgios finds himself in yet more bother at 15-30 down, but Murray sprays a couple of balls wide to hand the Australian game point.

A short looping return is there for the taking for Kyrgios, but he shanks it long. And makes another hash of the next point to give Murray set point. That goes wanting and Kyrgios regroups to reach game point, dipping down to pick up a low ball at the net.

Murray continues with his tactic of keeping the ball low and throwing in the drop shots appears to work, as 6ft 4ins Kyrgios struggles to get down to the ball and the Briton gets another set point.

Again, Kyrgios saves it and then rattles off three points, finishing with a forehand winner, to seal the game and force Murray to serve for the set.

You'd have to say Murray is still in control, mind.