That's break point number five gone for Estrella Burgos. Another error with the backhand slice.

This game has last 12 minutes so far! Anyone want to take it?

Piers Newbery
BBC Sport at Melbourne Park

With five minutes remains until the hour mark in this match, Kyrgios is two sets up on Brazilian Dutra Silva and completely untroubled. Twelve aces, 25 winners, four breaks of serve and, perhaps most importantly, no sign of the knee strapping he wore throughout his victorious run in Brisbane two weeks ago.

Break point number four: in the bin.

Set point number one: in the bin.

Set point number two: in the bin.

On to deuce number six we go!

Rafa's got a bit careless here. His forehand drops wide of the line to hand Estrella Burgos another break opportunity.

The world number 81 can't snatch it again. He's gone long.

WAIT, another break point! He's outsmarted Nadal at the net with a volley followed by a slam.

Oh heck. Break point #3 has gone too. Estrella Burgos sends a forehand over the whitewash.

We continue...

Oh, hello. Estrella Burgos has snatched a point from Rafa's serve. And another. He's 15-30 up.

The 37-year-old tries to flip a delicate backhand over the net, but it doesn't clear it. Never mind, though. Rafa hits high and wide and offers up a break point to his languishing opponent.

But now the Dominican has got his hand on his head. A sliced backhand goes into the net and the break point disappears.

Victor Estrella Burgos edges towards a hold of serve, moving 30-15 ahead. But then the Dominican clips a forehand into the net. He looks frustrated.

That frown continues as Nadal comes forward to volley cross-court to bring up another break point.

It's saved! Our first deuce of the match. But then Estrella Burgos lands a forehand wide of the sidelines.

Another break point for the Spaniard. This time he takes it, as his opponent hits long.

This is only going one way...

Leon Smith
GB Davis Cup captain on BBC Radio 5 live sports extra

Estrella Burgos is not going to beat Nadal on power so he has to try something else and keep mixing the play with spin, drops and lobs, but it's difficult to do that given the pace of the ball he is receiving from Nadal and the amount of ground he has to cover.

Nadal throws down his second ace of the match, followed by a volleyed winner for 40-0.

Estrella Burgos nets and it's another hold to love for the world number one.

Leon Smith
GB Davis Cup captain on BBC Radio 5 live sports extra

Fatigue has to be setting in even though Estrella Burgos has only been on court for 40 minutes because of the number of sprints he's having to put in. He's having to chase everything and is working his socks off.

Victor Estrella Burgos thinks he's just sunk a winner into the corner. Rafa has a different idea.

The world number one pulls out a ridiculous stretching return which surprises Estrella Burgos so much he drops his racquet.

Nadal brings up another two break points. One is saved by a pulsating forehand from Estrella Burgos, straight down Rafa's left-hand side.

But then the Dominican goes long (again). Nadal's lead extends (again).

A familiar phrase booms over the tannoy at the Rod Laver Arena.

"Game Nadal".

The Spaniard drops just one point along the way.

Image source, Getty Images

I can't remember Victor Estrella Burgos making a single trip to the net in the first set.

He's just come rushing in and completely outfoxed the world number one with a simple but smart dropshot. The crowd give him a big cheer for that.

But then it all comes undone. The Dominican is back on the baseline, inviting powerful returns, and Nadal brings up a single break point.

It looks like Burgos has hit long...but he challenges...and even Rafa tells him to challenge that call. They're both right - it landed on the line.

He's not so lucky on the next attempt. Estrella Burgos does hit long this time and Nadal breaks for an early lead in the second set.

Piers Newbery
BBC Sport at Melbourne Park

He made it through three games unscathed against Rogerio Dutra Silva but Nick Kyrgios picks up a code violation in game four, umpire Fergus Murphy unimpressed by his admonishment of the crowd for calling out during his service motion. Kyrgios then enters into a debate with Murphy at the changeover about the rights and wrongs of the warning.

Meanwhile, the Australian 17th seed rolls through the first set with two breaks and looks extremely impressive. You need to if you're wearing 'hot pink'.

Image source, AFP

Clinical.

With a cheeky little slice over the net, Rafael Nadal takes the first set in 23 minutes.

A warm round of applause for Victor Estrella Burgos, who gets off the mark for 15-0 in his service game. The Melbourne crowd obviously want to see a competitive match, and not a walkover.

The Dominican world number 81 stays composed as Nadal challenges a call on the baseline - his return was called out before the umpire overruled it. It goes in Estrella Burgos' favour after the replay.

And he avoids the bagel! Estrella Burgos holds to get off the mark in the Australian Open first round.

Just when it looks like another love hold, Rafael Nadal hits a forehand just long over the baseline. A small, tiny way in for Estrella Burgos.

But that's all the Dominican gets. His backhand goes awry in a decent rally and Nadal holds again.

This is one way traffic so far.

Victor Estrella Burgos gets off the mark on his service game but Nadal's forehand continues to do the business and he brings up another two break points.

Nadal snatches another game for a very healthy first-set lead.

Image source, Getty Images

Meanwhile, women's second seed Caroline Wozniacki has started well against Romania's Mihaela Buzarnescu, recording an early break in the first set over on Margaret Court Arena.

In-form Australian Nick Kyrgios has just broken Brazil's Rogerio Dutra Silva to lead 3-1 in the opening set on Hisense Arena.

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Nadal means business here.

A fantastic forehand cross-court lands right on the line as he holds again, dropping just one point along the way.

Victor Estrella Burgos, at 15-0 to the good, enters a baseline battle with the world number one.

The 37-year-old goes for the killer blow...but it sails over the baseline.

And all of a sudden, the Dominican hands Nadal two break points with a massively overcooked forehand.

He saves the first with an ace but that heavy forehand strikes again. Nadal breaks for a 2-0 lead.

*denotes next server