Kim Clijsters
Four-time Grand Slam champion on BBC Radio 5 live

Djokovic has too much time at the moment. Nadal is hitting the ball hard, but with so much spin that it just pops up, and it's not hurting Djokovic enough. It works on clay but on hard court it doesn't have the same impact.

Image source, AFP

Another wide forehand from Nadal...but he dishes up a lovely, spinning serve to draw level at 15-15.

Djokovic then reaches the next serve but Nadal moves into the net and slams a volley into the open court. A little rally breaks out and Nadal is stretching as his forehand pops long.

Djokovic gets lucky with a drop off the top of the net but Nadal recovers with an excellent backhand and moves 40-30 up.

Russell Fuller
BBC tennis correspondent at Melbourne Park

Nothing is going Nadal's way.

Jonathan Jurejko
BBC Sport at Melbourne Park

A hum of amazement from the Laver crowd as they chatter at the changeover.

Djokovic has cracked nine winners already... And made just one unforced error.

Image source, EPA

Nic MacLellan‏: Yesterday I wanted both Osaka and Kvitova to win, but today I'm Team Rafa all the way. Would be amazing to see him win a Slam on hard courts again.

Kim Clijsters
Four-time Grand Slam champion on BBC Radio 5 live

Every ball that drops too short, Djokovic is on top of and looking for the opening. It's so dominant.

Image source, Reuters

Djokovic moves 30-0 up in no time. That's 10 points from 10 he's won on serve. An ace makes it 11 and he wraps up the game with a stunning backhand.

This is absolutely ruthless.

Jonathan Jurejko
BBC Sport at Melbourne Park

How does Djokovic do that? The man is barely human. He was moving across the baseline like he was being controlled by a computer joystick.

Steven Whitehead‏: My tennis match was cancelled this morning due to poor weather, guess Djokovic vs Nadal will have to do...

Kim Clijsters
Four-time Grand Slam champion on BBC Radio 5 live

Rafa, when the adrenaline gets going, that's when he can play some incredible tennis.

Image source, Reuters

Marion Bartoli
Former Wimbledon champion on BBC Radio 5 live

Nadal has to find a way to get Djokovic out of position on the return. That lefty-slice serve, stretching him out wide, is much better.

Russell Fuller
BBC tennis correspondent at Melbourne Park

Big celebrations from Nadal at the far end! He's only won a game - but it's a start.

Nadal drops two strong serves and takes the advantage, then smashes a forehand out wide and Djokovic can't reach it.

He's on the board!

Kim Clijsters
Four-time Grand Slam champion on BBC Radio 5 live

I wasn't that quick!

Marion Bartoli
Former Wimbledon champion on BBC Radio 5 live

I feel like I'm watching Kim 10 years ago when she was sliding all over!

Nadal works the point but hits a poor drop volley and Djokovic sends it down the line. He recovers with a testing serve down the T but Djokovic smashes a backhand winner.

Nadal then produces one of his trademark round-the-net forehands and picks up the pace but overcooks his backhand. Break point.

Image source, Reuters

Dylan Cleary‏: I'm not sure if Rafa is nervous or just a little rusty because of the extra day but he's playing cautious. And that's not the style of tennis that is gonna work against Djokovic

Russell Fuller
BBC tennis correspondent at Melbourne Park

It is just utter domination for the world number one. Nadal has won one point in the opening three games.

Image source, Getty Images

Hmm. Worrying. Nadal's forehand flies high off his racquet and Djokovic quickly storms to 40-0 up.

An ace just rubs salt into the wounds. Three games down and Nadal has won just one point. Ouch!

Marion Bartoli
Former Wimbledon champion on BBC Radio 5 live

Very uncharacteristic miss from Rafa, especially with his forehand, but the defensive skills from Novak are so good, it must feel as though the court is shrinking.

Image source, Reuters