If Naomi Osaka is having some physical issues, she isn't letting it show as she speeds through a love hold with a series of brilliant winners.

A rare easy hold of serve for James Duckworth as Jannik Sinner appears to check out of this latest game upon falling behind. Just two more games needed to confirm his place in round three.

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Former Australian Open winner Stan Wawrinka, asked how he feels after a marathon second-round win over Arthur Gea: "Exhausted!

"As I told you, it's my last Australian Open so I'm trying to last as long as possible.

"Not only did I have fun, but the crowd gave me so much energy. I'm not young any more so I need your energy and I need extra energy from you.

"It's an amazing feeling to be on this court and to have so much support. It was a long match and I don't know how I'm going to recover, but I'm super happy."

Jannik Sinner recovers from going break point down with a double fault to reaching game point with an ace, but the world number two's first shot at a 4-0 lead passes him by as he misses a backhand.

After a fourth deuce, Sinner eventually gets over the line - still unbroken in this match - as Duckworth hits long.

Naomi Osaka called for the trainer and headed off court for some medical treatment. Not quite sure what the issue was for the four-time major winner but she has raced back out of the tunnel and looks ready to continue.

Oh, hello! Maybe we're not quite done here yet...

Just a second double fault from Jannik Sinner, and it presents James Duckworth with only his second break point of the match.

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In 2009, Novak Djokovic, Stan Wawrinka, and Marin Cilic all made the third round of the Australian Open.

17 years later, all three men are in the third round again.

Round two results:

• (4) Novak Djokovic 6-3 6-2 6-2 Francesco Maestrelli
• Marin Cilic 6-4 6-3 6-2 Denis Shapovalov (21)
• Stan Wawrinka 4-6 6-3 3-6 7-5 7-6 (10-3) Arthur Gea

After grabbing a fairly easy hold, Naomi Osaka gifts Sorana Cirstea the points in the Romanian's next service game with a handful of unforced errors. The Japanese 16th seed still has that break advantage, though.

Stan Wawrinka is the first man aged 40 or over to reach the third round of a Grand Slam in singles since Ken Rosewall at the 1978 Australian Open.

It's the first time he's won two matches in a row at a Grand Slam since the 2023 US Open and the first time he's advanced to the third round in Melbourne since 2020.

Jannik Sinner senses the opportunity for a double break as he sets up two more break points, however James Duckworth isn't done fighting here.

The Australian battles back to deuce with a forehand winner but can't get over the line.

When Sinner arrives at a third break point thanks to a backhand winner, Duckworth double-faults. Such a frustrating way to undo his good work.

Naomi Osaka took some time off court after losing that second set, but she's back now and ready to play.

She's met with some aggressive hitting from Sorana Cirstea, but Osaka finds her feet and wins the next three points to go 30-40 up.

She's over-eager and sends the break point long but she gets another shot and has has better luck on the next one for an early advantage in the decider.

Russell Fuller
BBC tennis correspondent on BBC Radio 5 Sports Extra

Stan Wawrinka drinks in the applause and puts his right hand to his heart, he's smiling a very satisfied smile.

Stan Wawrinka advances up the court and buries a forehand winner.

He has SIX match points.

Jannik Sinner backs up his break of serve with an efficient love hold, helped along with a couple of aces.

That's his ace count up to 14 now. He's also won 86% of points behind his first serve. The outcome has long felt inevitable.

A pin-point lob from Stan Wawrinka followed by a double fault from Arthur Gea, who can hardly stand upright.

Wawrinka is two points away from round three.

There's a contingent of French fans behind Arthur Gea and they cheer their hearts out as Stan Wawrinka nets a backhand.

However, the 21-year-old is up on his back at the end of the next point, Wawrinka final getting a net cord to go his way and rushing the net as the ball sits up. Gea dashes after his cushioned volley but can't get there.

An untimely double fault from Arthur Gea: 2-4.

He tries the serve and volley, a successful strategy throughout the match, but drops his backhand into the net: 2-5.

Daylight for Stan Wawrinka.

Remember, this tie-break is first to 10, not seven.

Jannik Sinner seeks to put immediate pressure on James Duckworth in what he hopes will be the final set of this match, putting away a backhand for 0-30 on the Australian's serve.

Duckworth double-faults a couple of points later to leave the door open, but responds impressively to shut down the two break points and reach the temporary safety of deuce.

That's all it proves to be. Sinner makes his move as he looks for a quick end to this match.

Arthur Gea is really struggling. He's wincing and crouching down in between points.

Stan Wawrinka can't build on his advantage, hitting a forehand into the tramlines, but keeps himself in front with a backhand volley at the net. Gea had been dragged to the opposite corner and although he made up the ground, he couldn't get a racquet on it.