Deja vu?

Korda blitzes a return of serve past Norrie to open the third set with a break, just as he has in the previous two.

Korda plays Norrie at his own game, rushing forward and watching as Norrie's little baseline whip drifts long.

Break point number five for Korda.

This is better from Norrie, though, hanging in the rally before coming forward to pop away the winner.

Deuce.

Hmm.

A less-than-ideal forehand goes long, and Korda has another chance to break.

And Korda nets a forehand!

That gets some more positive emotions out of Norrie. Deuce.

Norrie saves break point number one with a big serve, one that has a hint of frustation behind it.

A shimmy to the net takes care of the second.

30-40...

Oh, it's just not happening for Cameron Norrie.

He looks fed up as he mis-hits consecutive forehands and gifts Seb Korda three early break points.

Cam Norrie will serve to start this crucial third set.

You might remember Sebastian Korda from last year's Wimbledon, where he beat Dan Evans in the third round.

He's also from a sporty family. Sister Nelly is the world number one ranked golfer. She won Olympic gold last year and has won a hatful of titles on the LPGA Tour.

Eldest sister Jessica is also a golfer and is ranked 21st in the world. Dad Petr is a former world number two who won the Australian Open in 1998, while mum Regina Rajchrtova was also a top-30 player.

Read more about the Korda's here.

Easy as you like.

There's just a quiet shake of the fist from Seb Korda as he rattles through the second set in dominant fashion.

Another one like that, and he's through to the second round.

Naomi Osaka opened her title defence with a 70-minute victory over Camila Osorio.

Osaka let a 5-0 opening-set lead slip slightly, but composed herself quickly to come through 6-3 6-3.

Elsewhere, Greece's Maria Sakkari battled past Germany's Tatjana Maria 6-4 7-6 (7-2).

Olympic champion Belinda Bencic and bronze medalist Elina Svitolina were also among the winners on the opening day.

Image source, Getty Images

The first break points slips by as Korda shanks a forehand, but Norrie just cannot find his range on the forehand.

Another ball ends up planted in the net, and Korda will serve for the second set bagel.

And Korda keeps on coming, this time working his way to two break points...

No messing around from Sebastian Korda, using his forehand to great effect as he races through a hold to 15.

Cameron Norrie, speaking about Sebastian Korda on Sunday: "He is young, up-and-coming, he has a very complete game, a big serve.

"He plays great in quick conditions so it definitely suits him playing here. I lost to him to last time so I’m going to have to bring my game and play even better than I did last time.

"It’s going to be a difficult one, it’s not the easiest of draws but no draws are easy. I’m looking forward to the challenge, I’m feeling good, I’ve got some good work in and good volume in this week so I’m looking forward to that."

Cameron Norrie is not having much fun.

A big double fault hands Korda three break points, and the Brit can only find a second serve that his opponent mullers back past him.

Ouch.

Rafael Nadal, bidding for Grand Slam #21 and his first Aussie Open title since 2009, is in complete control against Marcus Giron.

He's been on court for just 45 minutes but already has a healthy set and a break lead over the 66th-ranked American.

A gorgeous whip down the line gets Korda to game point, but there's a gasp from the crowd as he trips into a double fault.

Some fine defence from Korda in a 19-shot rally hurries him along to another advantage, though, and he whacks down a big first serve to hold.

And Korda saves the break point with an equally good bit of movement forward, with Norrie unable to put away a backhand.

Deuce.

Nice, really nice, from Norrie, getting himself into a rally before moving forward to the net and finishing off the point.

Hello, break back point.