Day eight of the Australian Open
Novak Djokovic beats Jiri Lehecka 6-3 6-4 7-6 (7-4) in fourth round
Jack Draper retires injured while trailing Carlos Alcaraz 5-7 1-6
Defending champion Aryna Sabalenka beats Mirra Andreeva 6-1 6-2
Coco Gauff joins her in quarter-finals after 5-7 6-2 6-1 win over Belinda Bencic
Britain's Henry Patten and Olivia Nicholls beat Italian top seeds to reach mixed doubles quarter-finals
Use audio icon to listen to live commentary from Melbourne on BBC Radio 5 Sports Extra (UK only)
Djokovic 6-3 6-4 3-3 Lehecka*
Night-time is drawing in on Melbourne as the crowd clap to the White Stripes over the loudspeaker on the change of ends.
Novak Djokovic wears a thoughtful expression on serve as Jiri Lehecka outplays him to level at 30-30, before a deep first serve opens up game point.
The Serb comes through with an ace.
Image source, Getty Images*Djokovic 6-3 6-4 2-3 Lehecka
Pat Cash
Former Wimbledon champion on BBC 5 Live and BBC Sounds
Djokovic is having to raise his game – some really long tough rallies.
Lehecka has played his best tennis in the last two games.
*Djokovic 6-3 6-4 2-3 Lehecka
Jiri Lehecka stretches to slam a wonderful deep forehand winner down the line.
He sees out the rest of the game, holding to love with another forehand winner across court.
The Czech 24th seed is not giving this match up without a fight.
Djokovic 6-3 6-4 2-2 Lehecka*
A breezy hold to love for Novak Djokovic, who seals it in style with a second serve ace.
The Serb seventh seed is greeted by a number of "Novak Novak" chants from a pocket of the crowd.
*Djokovic 6-3 6-4 1-2 Lehecka
Novak Djokovic is quickly back on his game as he moves well around the court before firing a forehand winner for deuce.
Jiri Lehecka saves a break point with a strong first serve after double-faulting, before holding by whipping a forehand winner across court.
The crowd are really into this one now.
Djokovic 6-3 6-4 1-1 Lehecka*
Novak Djokovic saves the first break point but not the second as he puts a backhand into the net.
A glimmer of hope for Jiri Lehecka.
Image source, Getty Images*Djokovic 6-3 6-4 1-0 Lehecka
Pat Cash
Former Wimbledon champion on BBC 5 Live and BBC Sounds
Djokovic is venting that he can’t see that drop shot.
He was pointing to his eyes and screaming to his team.
Andy Murray has to be an optometrist as well.
*Djokovic 6-3 6-4 1-0 Lehecka
Novak Djokovic is complaining about something - it looks like he's heard something in the crowd.
Jiri Lehecka moves 0-30 up and that brings more frustration for the Serb, before a double fault offers three break points.
Where has this come from?
*Djokovic 6-3 6-4 1-0 Lehecka
Break point for Novak Djokovic as Jiri Lehecka puts a forehand wide and it's gifted to the Serb with a double fault.
The Czech is two sets and a break down and you can't see a way back from here.
Djokovic 6-3 6-4 0-0 Lehecka*
Jiri Lehecka doesn't want to fall behind early in this third set like he did in the second and he finds himself in a tricky position at 30-30.
The Czech wins the next point but Djokovic then forces a backhand error and the game moves to deuce.
Djokovic 6-3 6-4 0-0 Lehecka*
Pat Cash
Former Wimbledon champion on BBC 5 Live and BBC Sounds
I think one of the reasons Novak is a bit patchy is that he hasn’t played many matches. It’s about playing matches under pressure.
I know he is saving his body, he’s played a lot of matches under pressure.
But typically a lot of older players find their form drops off and a lot of the time its just they don’t play enough tough matches.
I would imagine Murray will be encouraging him to play more matches.
Djokovic 6-3 6-4 0-0 Lehecka*
Novak Djokovic gives little away as two strong first serves put the Serb into a 30-0 lead.
He brings up three set points and gobbles them up at the first opportunity with an ace down the middle.
Pretty emphatic from the 24-time Grand Slam winner.
Image source, Getty Images*Djokovic 6-3 5-4 Lehecka
Jiri Lehecka does what he needed to do and holds with a bouncy second serve which Novak Djokovic can't keep in play.
The Serb seventh seed will now serve for the opportunity to go two sets up.
Djokovic 6-3 5-3 Lehecka*
Pat Cash
Former Wimbledon champion on BBC 5 Live and BBC Sounds
Lehecka is playing better – and that is forcing Djokovic to play better.
Djokovic 6-3 5-3 Lehecka*
Novak Djokovic wins a remarkable point, somehow keeping the ball in play on the stretch numerous times.
That bring a deep breath and wipe of the forehead from the Serb, who goes on to hold to 15 with an ace down the middle.
Djokovic is inching closer to this second set.
Image source, Getty Images
Humbert 1-6 6-2 3-6 2-6 Zverev
Image source, Getty ImagesJob done for Alexander Zverev. The German second seed overcomes a brief blip to move into the quarter-finals with a 6-1 2-6 6-3 6-2 victory over France's Ugo Humbert.
"I'm extremely happy to be in the quarter-finals having only losing one set. The last set I lost my opponent played incredibly and I didn't have much chance of winning it," Zverev said.
"A week ago I was very unsure of my level, I was very unsure of my tennis. I couldn't really play many points in practice, I couldn't prepare the way I wanted. That's why I am even more happy to be in the quarter-finals.
"I definitely want to play three more matches here so we will see how that goes."
American 12th seed Tommy Paul is next up for Zverev.
*Djokovic 6-3 4-3 Lehecka
A big serve gives Jiri Lehecka advantage and he secures the hold with a forehand winner down the line.
The Czech has come close to slipping further behind a couple of times in this second set but has fought back admirably.
Image source, EPADjokovic 6-3 4-2 Lehecka*
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.
Djokovic 6-3 4-2 Lehecka*
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.
*Djokovic 6-3 3-2 Lehecka
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.
Image source, Getty Images
