Tomas Machac goes long and that's break point saved.

Novak Djokovic produces a big serve to earn himself a set point.

Image source, Getty Images

Jack Draper is into the third round of the Australian Open for the very first time, but it hasn't been an easy ride.

The British number one has spent a whopping eight hours and 36 minutes on court over two matches, having needed to come two five-set thrillers against Mariano Navone and Thanasi Kokkinakis.

He'll be hoping for an easier gig against Aleksander Vukic today but, just like against Kokkinakis, Draper is going to have the Melbourne crowd against him as he takes on a home hope.

Now then, this makes things interesting.

Tomas Machac has a crucial break point as Novak Djokovic tries to serve out this second set.

After that fairly speedy Coco Gauff win, Jack Draper and Aleksander Vukic are lining up in the tunnel and ready to make their way onto Margaret Court Arena.

Tomas Machac dictates the points on his service game, forcing Novak Djokovic to run around the court as he tries to stay in the rally.

It works out perfectly for the Czech as he takes the hold to love and Djokovic will have to serve it out.

Another hold on the board for Novak Djokovic. Tomas Machac hits his foot with his racquet as he misses the forehand then follows up with another into the net.

You would think Machac wants to be in those long rallies with Djokovic looking pretty uncomfortable the longer the points wear on.

The Serb's level has been good but he still doesn't look 100%. He could break for the set here, though.

It seems both of these two need a bit of an easy ride for a few games as Tomas Machac takes the hold to 15.

Ryan Harrison
Former American tennis player on BBC Radio 5 Live and BBC Sounds

Coco Gauff has looked very comfortable out there today.

She faced a little bit of a scare early on against Jodie Burrage but she has been really consistent today. She got that break in the late stages of the first set and the second set has just been one-way traffic.

Novak Djokovic has had enough of these long, tiresome rallies and takes the hold to love with an ace.

That's his fourth game in a row to turn the set on it's head after going down a break.

A solid start as Coco Gauff looks to serve out the match. She's got a clenched fist as she kisses the line with a forehand winner, before slamming a bruising backhand across court and wrongfooting Leylah Fernandez.

And there's three match points.

Got it this time.

Novak Djokovic makes no mistake at the second attempt and a frustrated Thomas Machac gestrures to his ccoaching pod before heading back to the chair.

Coco Gauff wants this over and done with, but her efforts to attack Leylah Fernandez's serve are too strong and she overhits.

The third seed pushes into the net, postponing what seems like an inevitable victory for at least one more game.

Novak Djokovic produces a brilliant crosscourt backhand winner to earn a second break point.

He waves his arms around to get the crowd going but again drops his head as though he is struggling with fatigue.

Novak Djokovic works himself a break point but Tomas Machac saves it with a clever drop shot that wrongfoots Djokovic.

Very, very nice. Leyah Fernandez does well to deal with a big first serve from Coco Gauff, but the world number three switches up play with a delightful drop volley at the net.

From that moment of magic to two nasty double faults and Gauff throws down her towel in frustration, berating herself as she walks back to the beaseline.

Even as she wraps up the hold, the American looks annoyed with herself. She's only one game away from a place in the fourth round.

Back under way on Rod Laver after Novak Djokovic's medical timeout.

He still doesn't look 100% but he takes the hold to 15 to keep us on serve.

This time Coco Gauff gets it. Three successive breaks of serve for the third seed, who is overpowering her Canadian opponent.

Ryan Harrison
Former American tennis player on BBC Radio 5 Live and BBC Sounds

Andy Murray would have thought he was safe from his head-to-head match-up records against certain players after retiring, but you have to hold him accountable right?

He didn't necessarily have all the answers when he was playing Tomas Machac, so then you have to wonder if he didn't have the answers himself then what is he going to be telling Novak Djokovic?

Image source, Getty Images

Coco Gauff throws her hands up in frustration. She had that point at her mercy, but she sends a simple forehand into the net. Deuce.

But Leylah Fernandez struggles in another lengthy rally, planting into the net, to hand her opponent yet another break point.