Novak Djokovic outplays Jiri Lehecka and greets the crowd's cheers on court at Rod Laver Arena, celebrating with a big grin and beckoning gesture.

The Serb brings up two more break points but Lehecka fights back, taking the game to deuce with an inch-perfect drop shot.

Novak Djokovic moves into a 40-0 lead as Jiri Lehecka can't keep a volley at the net in play.

The Serb - a 10-time winner here in Melbourne - puts a backhand long but makes amends next point, holding with an ace.

He holds his pose after winning the game before rolling his spare balls to the ball kids.

It's another break point for Novak Djokovic as Jiri Lehecka puts a backhand into the net, but the Czech saves it with an overhand smash.

Lehecka goes on to hold to keep himself in this second set.

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The crowd love that one as a drop shot gives Jiri Lehecka a 30-15 lead and Novak Djokovic is equally as impressed as he applauds the Czech.

Djokovic isn't fazed as he fights back to earn a break point but it is saved by a wonderful drop shot by Lehecka at the end of a long rally.

Djokovic stands and stares in disbelief.

Pat Cash
Former Wimbledon champion on BBC 5 Live and BBC Sounds

Great depth from Djokovic. It is one of the things we will remember when he’s gone.

Lehecka can't get into the rallies. He just hasn't got his timing.

Jiri Lehecka goes into the net after a lengthy rally before Novak Djokovic secures the hold with another strong serve.

Djokovic reacts by clapping his racquet towards his coaching team.

Novak Djokovic steps up to serve and is greeted by a pocket of fans chanting his name.

Jiri Lehecka makes a dart into the net forcing Djokovic to put a backhand long, but some deep hitting from the Serb wins him the point.

Lehecka does well to force deuce with a big backhand that Djokovic can't keep in play.

Pat Cash
Former Wimbledon champion on BBC 5 Live and BBC Sounds

One of the things I didn’t like about Lehecka was he had the break point and he missed it. It was a nothing kind of shot.

He’s going to have to just let it rip. Not very proactive.

Jiri Lehecka holds to love with little resistance from Novak Djokovic - he needed that after a couple of troubled games on serve.

Novak Djokovic comes through deuce with a couple of big first serves to consolidate his break.

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That's better from Jiri Lehecka as he moves Novak Djokovic around the back of the court before sealing the point with a backhand volley at the net.

The Czech then brings up a break point as Djokovic goes long with a backhand but he lets it slip with a loose forehand.

Deuce.

Pat Cash
Former Wimbledon champion on BBC 5 Live and BBC Sounds

Having Andy Murray in the corner was a great move. If anyone can keep you motivated to keep you going, it’s one of your biggest rivals.

Hopefully it will pay off – time will tell.

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Two-time defending champion Aryna Sabalenka sailed into the quarter-finals, moving past 14th seed Mirra Andreeva with a 62-minute 6-1 6-2 victory.

Sabalenka, who has now won 18 straight matches at the Australian Open, will face Russian Anastasia Pavlyuchenkova after the 27th seed defeated Croatia's Donna Vekic with a 7-6 (7-0) 6-0 win.

American third Coco Gauff seed fought back to claim a 5-7 6-2 6-1 win against Belinda Bencic and set up a last-eight meeting with Spain's Paula Badosa, who beat Serbia's Olga Danilovic 6-1 7-6 (7-2).

In the men's draw, American 12th seed Tommy Paul surged past Spain's Alejandro Davidovich Fokina, wrapping up a 6-1 6-1 6-1 win in less than an hour and a half on Margaret Court Arena.

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Jiri Lehecka has lost his composure here as Novak Djokovic moves into a 15-40 lead with two break points.

The crowd are trying to offer encouragement to the Czech 24th seed, but another long forehand gives Djokovic the break.

The Serb offers a quick fist pump and shouts "come on".

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We're speeding through the sets over on John Cain Arena.

There was very little to separate Alexander Zverev and Ugo Humbert in that third set until second seed Zverev struck for a 5-3 lead before serving it out to move one step closer to the quarter-finals.

American 12th seed Tommy Paul, who won 6-1 6-1 6-1 against Alejandro Davidovich Fokina earlier today, awaits the winner of this one.

Pat Cash
Former Wimbledon champion on BBC 5 Live and BBC Sounds

Novak didn’t have to do too much in those rallies. Lehecka got the timing all mixed up.

I thought his tactics were good for the first couple of games.

After that a couple of poor games, when you have to make Novak earn the set.

Novak Djokovic brings up two set points as Jiri Lehecka can't get a forehand into play.

The Serb secures it as Lehecka puts a backhand long.

A number of unforced errors crept into Lehecka's game towards the end of that first set.

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A big win for the Brits in the mixed doubles.

British duo Olivia Nicholls and Henry Patten have knocked out Italy's Sara Errani and Andrea Vavassori, the top seeds, with a 6-3 6-4 win to reach the quarter-finals.

Pat Cash
Former Wimbledon champion on BBC 5 Live and BBC Sounds

Lehecka just came and went.

That was a shocker and very harsh to the young guy but I think he would admit that himself.

Jiri Lehecka skews a forehand wide and all of a sudden he's in a spot of trouble against Novak Djokovic.

Another loose shot offers up two break points and the Serb takes them at the first opportunity as Lehecka nets again.

A poor game from the Czech, which you can't afford against a player like Djokovic.

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