Jannik Sinner has won each of his past 16 matches, and each of the past 11 without dropping a set.

The last time he did drop a set was in a three-set victory against Alexander Zverev in the Vienna final in October last year.

The Italian won 58 of the 64 matches he contested in 2025.

Four of those six losses came at the hands of rival Carlos Alcaraz, with Alexander Bublik and Tallon Griekspoor the only other players to get the better of Sinner.

Image source, Getty Images

A poor start for Naomi Osaka.

Another couple of quick misses gift her opponent an early break.

An underwhelming start on Margaret Court Arena as Naomi Osaka and Sorana Cirstea take it in turns to make unforced errors. 30-30.

*denotes next server

As the match clock ticks past the three-hour mark on Kia Arena, we're still no closer to knowing who will win the fourth set between Arthur Gea and Stan Wawrinka.

If Frenchman Gea wins it, that will signal the end of Wawrinka's final appearance at the Australian Open before he retires later this year.

Naomi Osaka has toned her outfit down slightly. She hasn't got the full works this time, leaving the white umbrella, hat and veil at home.

Some fans have filled in though. They're kitted out with the white hat and veil - and they have included the butterfly too.

Naomi Osaka and Sorana Cirstea have only faced each other once before, way back in 2015.

That was when the pair met in the first round of qualifying for Wimbledon, with Cirstea fighting back for a 2-6 6-1 6-4 win against a then 16-year-old Osaka.

Image source, Getty Images

Image source, Getty Images

"He's obviously playing pretty well and he's pretty good in Australia, but if I come out and play aggressive, I can cause him some problems. I know it was a couple of years ago, but I beat him once before."

Australian wildcard James Duckworth faces an almighty task as he takes on reigning Australian Open champion Jannik Sinner.

But he has got the better of the Italian once before, prevailing in straight sets in Canada in 2021.

On that occasion, Sinner was not best pleased with Duckworth's antics - to say the least - after he celebrated one of his errors, and he was not shy to voice his frustrations.

Image source, Getty Images

Over on Margaret Court Arena, two-time Australian Open champion Naomi Osaka is back in action, two days after she dazzled in her jellyfish-inspired outfit at Melbourne Park.

The four-time Grand Slam winner made a statement entrance on Rod Laver Arena before her first-round match against Antonia Ruzic, with an outfit she dedicated to her daughter Shai.

After her 6-3 3-6 6-4 win, the 28-year-old revealed the outfit was originally inspired by a jellyfish which she saw in a book while reading to her two-year-old daughter.

She meets Sorana Cirstea in the second round as she looks to extend her 10th Australian Open appearance - and I can confirm the jellyfish outfit is back too.

Members of the public have been invited to observe one minute of silence on the National Day of Mourning to honour those impacted by the Bondi Beach attack last month.

That has just taken place now on Rod Laver Arena before Jannik Sinner's meeting with James Duckworth.

Image source, Getty Images

Jannik Sinner has never lost a Grand Slam match to a player ranked as low as James Duckworth's position of 88th.

The world number two has also won all six matches he has played against wildcards at the Grand Slams.

It gives you a decent idea of how big an upset this would be if Sinner does not make the third round here.

The four-time Grand Slam champion is bidding to become only the fourth player in history to win three consecutive men’s singles titles at the Australian Open.

Possibly the best winning reaction we've seen so far?

Australian qualifier Maddison Inglis was overcome with emotion as she dropped to the ground after winning a dramatic third-set tie-break 10-7 against Germany's Laura Siegemund.

Great scenes as she celebrated her win in front of her delighted home support.

And she could face two-time champion Naomi Osaka next...

Image source, Getty Images

Image source, Getty Images

Image source, Getty Images

It's nearly time for the evening sessions on the show courts.

We'll be bringing you coverage of defending men's champion Jannik Sinner's meeting with Jack Duckworth on Rod Laver Arena and Naomi Osaka versus Soreona Cirstea from Margaret Court Arena.

Plus, there's plenty of action going on elsewhere in Melbourne.

Former champion Stan Wawrinka trails Frenchman Arthur Gea by two sets to one but fellow veteran Marin Cilic has just taken a two-set lead against Canadian 21st seed Denis Shapovalov.

31st seed Stefanos Tsitsipas has come from a set down against Tomas Machac. The third set is on serve with Machac leading 4-3.

And an all-Czech meeting between Tereza Valentova and Linda Fruhvirtova appears to be heading for a deciding set at 7-5 2-5.

Vintage Stan!

A backhand pass down the line brings up a break point, but Wawrinka can't get his return back in play on the next point.

Arthur Gea eventually got the job done after a couple of deuces and we're all square in the fourth set.

Image source, Getty Images

So, Iga Swiatek has booked her place in round three with a 6-2 6-3 victory over Czech Marie Bouzkova and plenty of other big names have also won on day five in Melbourne:

• Novak Djokovic 6-3 6-2 6-2 Francesco Maestrelli
• Amanda Anisimova 6-1 6-4 Katerina Siniakova
• Lorenzo Musetti 6-3 6-3 6-4 Lorenzo Sonego
• Jessica Pegula 6-0 6-2 McCartney Kessler
• Ben Shelton 6-3 6-2 6-2 Dane Sweeny
• Madison Keys 6-1 7-5 Ashlyn Krueger

Iga Swiatek is the first player in the Open era to reach the third round at each of the first 24 Women’s Singles Grand Slam events of a single decade.

The career slam dream lives on in Melbourne.

Image source, Getty Images

More from Iga Swiatek: "I feel like my approach to competition has always been good but the circumstances changed a little bit, it became a bit more of a routine to play these matches.

"I remember 2022 after quarter-final, my racquet went up, I was celebrating as I would now win a Grand Slam. The perspective changes but you always need to remind yourself to come back to enjoying playing.

"Sometimes it is not easy with so many matches per year. You are going to have bad days and going to be judged. It's crucial to come back to that. Maybe it's not easy but I think this is why, for example, Novak can play for so long. He achieved everything but he still enjoys winning. It's good to look at people like that and find some inspiration."

On her days off in Melbourne: "Everyday off was a beach day. I enjoyed that. I ate a lot of acai which I love. I am just happy to be in Australia. I hope the wind is going to calm down because it is super windy. I spent a lot of time on court to work, so I try to balance it out."

Arthur Gea progressed through qualifying to make the main draw in Melbourne and then defeated 17th seed Jiri Lehecka in round one.

He might be about to knock out a three-time former Grand Slam champion in round two.

The Frenchman seals a break back against Stan Wawrinka with a return that the Swiss player can only dump into the net.

So we're back on serve in the fourth set, with Gea leading by two sets to one.

Iga Swiatek, speaking after her second-round victory over Marie Bouzkova: "It felt great playing today, I felt more free than in the first round so I wanted to go for it.

"The conditions were not easy, I don't know if you can tell. It's super windy, so I needed to adjust to that so I'm happy for the performance for sure.

"Honestly - this is not going to sound like I'm humble - but after winning so much, it's hard to appreciate just one match. I'm usually happy after I finish the whole tournament if I win. If not, I am a bit less happy but I for sure have to learn to appreciate every single match and not take everything for granted. And play to win, not to lose. It was a good day today and I felt good."

Russell Fuller
BBC tennis correspondent on BBC Radio 5 Sports Extra

Iga Swiatek's dream of completing the career Grand Slam remains on track.

Four-times a French Open champion, a Wimbledon champion, a US Open champion. The Australian Open is the only crown to have not been captured by the Pole.

Arthur Gea goes long with a backhand at deuce so Stan Wawrinka has a break point at the start of the fourth set...

And he takes it! Gea long again from the back of the court.

The crowd are definitely on Wawrinka's side and hoping to inspire a comeback by the 40-year-old.