Roger Federer is on the board with a forehand winner after a brief battle of the backhands.

That's low, too low, from the Swiss, and Djokovic moves closer and closer to the first set...

A lovely backhand winner from Djokovic goes fizzing past Federer, before the Swiss misses a shovel down the line...

Roger Federer will serve first, and he hoicks an uppish forehand long.

Out wide goes Djokovic, and we're heading to a tie-break!

Mark Woodforde
17-time Grand Slam doubles champion on BBC Radio 5 Live Sports Extra

Djokovic is letting us know that he doesn't feel 100%. He's letting Roger know that he's a bit off-colour. We know Federer isn't 100% but he hates to show it.

Image source, AFP

An irritated, swinging, pacey ace from Djokovic goes ripping through Federer's racquet.

40-30...

Another long rally, backhand meeting backhand, and eventually it's Federer who floats his shot just a little wide.

That's another stunner of a service return from Federer though, putting the ball right into the corner of the court, and a stretched Djokovic sends his own response long.

30-30.

Ooh, hello! That's a sterling winner down the line from Roger Federer for 15-15.

He's hit 25 winners to Djokovic's five (FIVE!).

A one-two punch takes Federer to game point...

And there's the volley to close it out! What a hold. Djokovic will serve to take us into a tie-break.

Brilliant backhand from Federer!

Deuce.

Ooh, hello!

Federer leaps and sends a backhand volley over for 30-40.

One more break point for Djokovic...

I... have no idea how Federer has won this battle at the net as he's turned around, but his backhand volley somehow drops in front of Djokovic to get him on the board.

Federer's trying to smash his way out of this pickle but his backhand is launched over the tramlines, and Djokovic has two break points...

Image source, AFP

Jonathan Jurejko
BBC Sport at Melbourne Park

Novak's delight at breaking back and then levelling was probably only surpassed by a small group of Serbs on the sideline.

Five of them are wearing replicas of the green shirt - with, I think, an abstract white outline of Djokovic's signature croc - donned by their man.

Another guy is wearing a basketball vest with the name of Serb star Stefan Jovic on the back. Whilst also with what seems to be a water polo cap plonked on his head...

Roger Federer glares at the service line as he challenges a Novak Djokovic ace - oh, and he's right to! It's just long, and Djokovic will have to go again.

A kick serve from Djokovic which Federer ballons back at him, and Djokovic is overeager with the attempted cross-court winner.

0-15 soon becomes 15-15 as Djokovic cracks down an ace and then the Serb is all over the rallies, getting down low and drawing the errors out of Federer.

Game, Djokovic. Three games in a row to the defending champ.

Mark Woodforde
17-time Grand Slam doubles champion on BBC Radio 5 Live Sports Extra

Federer hasn't come out all guns blazing. He's been consistent and hasn't blinded us with outrageous winners, but it's still caused tremors up Djokovic's end of the court.

Oh!

An easy forehand for Federer, and he misses! Djokovic breaks back!

Image source, AFP

Wild, wayward forehand from Roger Federer, and Novak Djokovic has three tasty break points.

Long rally, Djokovic trying to end it with a drop shot - and a hurried Federer spoons his backhand into the net tape!

0-30...

Ouch.

Roger Federer double faults first up.

Here we go...