Novak Djokovic into fourth round with 6-3 6-4 7-6 win over Dutchman Botic van de Zandschulp
Second seed Iga Swiatek wins 6-1 1-6 6-1 against Anna Kalinskaya
Two-time champion Naomi Osaka pulls out through injury before third-round match with Maddison Inglis
Play was suspended for almost five hours on outside courts as temperatures neared 40C.
2014 champion Stan Wawrinka beaten by nine seed Taylor Fritz on farewell appearance
Jannik Sinner struggles physically during four-set win against Eliot Spizzirri
*Swiatek 6-1 1-6 5-1 Kalinskaya
Another break point scare as Iga Swiatek produces another unforced error.
However, the second seed snuffs out the danger with a quick body serve which Anna Kalinskaya returns long.
*Van de Zandschulp 3-6 4-6 0-0 Djokovic
Andy Lapthorne
Six-time US Open quad champion on BBC Radio 5 Sports Extra
Not quite sure what has happened to Novak Djokovic, he came out here looking very happy and relaxed.
All of a sudden from nowhere, he's the most angry man in the building.
Image source, Getty Images*Swiatek 6-1 1-6 5-1 Kalinskaya
Anna Kalinskaya gleefully accepts a shorter ball and takes a forehand a pace inside the baseline. She follows it in and drives the backhand winner home.
*Van de Zandschulp 3-6 4-6 0-0 Djokovic
A routine hold of serve for Novak Djokovic, who moves into a two-set lead and needs one more set for a 400th Grand Slam match victory.
*Swiatek 6-1 1-6 5-1 Kalinskaya
This time, Anna Kalinskaya nails the drive volley! 30-all.
Iga Swiatek nets a simple forehand. Is there another twist in this match?
Maybe not. Swiatek sends a monster serve down the T which Kalinskaya can only return into the net. Another pacy serve isn't returned into the court.
Match point.
Van de Zandschulp 3-6 4-5 Djokovic*
A hold of serve from Botic van de Zandschulp means Novak Djokovic will need to serve out the second set after the change of ends.
Djokovic's first-serve percentage has gone up considerably in set two from set one (76% from 59%) but, strangely, his percentage of points won on first and second serves has gone in the other direction.
*Swiatek 6-1 1-6 5-1 Kalinskaya
That just about sums up the third set for Anna Kalinskaya, coming in for a routine forehand drive volley and depositing it in the net: 15-30.
However, she avoids the unwanted bagel, taking a 40-30 lead and completing the hold with an ace out wide.
*Van de Zandschulp 3-6 3-5 Djokovic
Botic van de Zandschulp and Novak Djokovic swap service holds, so the Dutchman will shortly be serving to stay in the second set.
Djokovic is certainly irritated about something at the moment but he's still in a commanding position in this third-round match.
Swiatek 6-1 1-6 5-0 Kalinskaya*
Iga Swiatek holds to love, securing the game with a classic one-two punch: wide serve followed by a cross-court backhand as your opponent scrambles across the baseline.
Anna Kalinskaya is yet to hold in the third set.
Fritz 7-6 (7-5) 2-6 6-4 6-4 Wawrinka
Image source, Getty ImagesThree-time Grand Slam champion Stan Wawrinka speaking on-court following his Australian Open exit: "He's an amazing player, he's a tough fighter to play against, so congrats to him and his team. He was better today, no question about that.
"The atmosphere was unbelievable, so thank you guys for always showing up."
*Swiatek 6-1 1-6 4-0 Kalinskaya
This could be over very quickly. Anna Kalinskaya, struggling with a back injury, is being overpowered by Iga Swiatek and is becoming increasingly error-strewn, gifting the Pole three break points with a run of unforced errors.
She fights back to 30-40 with a jumping down-the-line forehand winner but then fires a loose forehand long.
She trails 4-0 and looks a little shell-shocked.
Swiatek 6-1 1-6 3-0 Kalinskaya*
Momentum swings again on Margaret Court Arena as Iga Swiatek earns an early break point and converts it with a backhand winner.
She produces two more winners on that wing to lead 30-0 but once again, her service game ends up being a little scratchy.
The second seed is pegged back to 30-0 but profits from of a backhand error from Anna Kalinskaya before sending down a whopper of a wide serve to complete the hold.
*Van de Zandschulp 3-6 2-4 Djokovic
Gigi Salmon
BBC Sport tennis commentator on BBC Radio 5 Live and BBC Sounds
Novak Djokovic is in a foul mood, he's yelling at his box and he's looking grumpy, but he's still in a very good position.
Image source, Getty Images*Van de Zandschulp 3-6 2-4 Djokovic
Novak Djokovic is taken to a couple of deuces but holds serve for a 4-2 lead in set two.
Fritz 7-6 (7-5) 2-6 6-4 6-4 Wawrinka
Ninth seed Taylor Fritz speaking following his victory over Stan Wawrinka: "It's a really tough match. The environment as well - I can't blame anyone in the crowd for cheering for Stan. It's amazing what he's out here doing. I have so much respect for the passion and the drive that it takes to be doing what he's doing this week."
On serving under the roof: "I feel like I've been serving pretty good with the roof open too, but it's been windy. When there's wind, it messes with the toss, the rhythm. With the roof closed, I could get into that rhythm."
On playing Lorenzo Musetti, who came through in five sets against Tomas Machac, in round four: "We've played a good amount throughout the years, most recently at the World Tour Finals. He's improved a lot in the last couple of years. He's difficult and he's pretty fit, so I'm sure he'll be ready to go for this last 16 match."
Swiatek 6-1 1-6 1-0 Kalinskaya*
An animated Iga Swiatek holds to 15, peeling off a winner on either wing as she races to 40-0.
Consecutive double faults are indicative of her lack of confidence on serve but she holds her nerve to close out the game.
Fritz 7-6 (7-5) 2-6 6-4 6-4 Wawrinka
The crowd roars every winner as Stan Wawrinka takes a 15-30 lead. However, Taylor Fritz is too strong and overpowers the former champion with a huge forehand to convert his only match point.
Wawrinka accepts the applause and cheers of the crowd. His fairy-tale run to the third round on his final outing in Melbourne is over.
Van de Zandschulp 3-6 2-3 Djokovic*
Botic van de Zandschulp holds serve and reduces his deficit to 3-2 in the second set, but he still trails Novak Djokovic by a break.
*Fritz 7-6 (7-5) 2-6 6-4 5-4 Wawrinka
Stan Wawrinka holds to 30. Over to you, Taylor.
Fritz 7-6 (7-5) 2-6 6-4 5-3 Wawrinka*
Yet another routine hold for Taylor Fritz. He's dropped just three points on serve in this set.
Can Stan Wawrinka force him to serve for it? He looked a bit flaky when asked to serve for the previous set, wasting four set points.
