Simona Halep and Eugenie Bouchard are out on court, ready to start.

Apparently these two don't get on at all, so this should be fun.

Britain's Dom Inglot has been on Tennis Breakfast after winning his first-round doubles match.

He gave us a brutal description of what it's like to play in the heat in Melbourne

"It's really difficult. The last couple of days haven't been that hot but then it's shot up to 40 degrees. There's no way of preparing for that. Unless you've played in Sydney or Brisbane, you're coming in from mid 20s to 40s.

"My hand goes down on the floor to brace myself to stand up when the serve is hit and I cant put my hand down because the court is burning my hand. It's literally burning my hand. Just when I think my partner's about to serve, that's when I push up.

"I was lucky I was on the outside court today as it was windy and that breeze really helps. It's not as humid as in previous years or if you're playing in America.

"But if you're playing in that stadium, without that wind, then it's stifling. It soaks up that heat even more."

Image source, Getty Images

Piers Newbery
BBC Sport at Melbourne Park

Image source, BBC Sport

You might be aware of this by now but it's been a touch on the warm side in Melbourne today. Ear-blisteringly hot - or maybe that's just me. Any extremity not coated in sunscreen is likely to turn crispy within about two minutes.

Local TV reported that the surface temperature of the court on Rod Laver Arena had reached 69C, which is not a typo. This is not unprecedented here, and Friday is forecast to be even hotter, with the best time to play tennis - if you really must - being earlier in the day, as it peaks at around 5pm local time.

The most sensible course of action is a tall drink in a dark room, as always.

If you're just joining us, here's what's happened in Thursday's second round matches.

• British number one Johanna Konta suffered a shock defeat by world number 123 Bernarda Pera.
• Wimbledon champion Garbine Muguruza also went out after losing in straight sets against world number 88 Hsieh Su-Wei.
• Former champion Novak Djokovic beat Gael Monfils in four sets.
• Fifth seed Dominic Thiem recovered from two sets down to beat Denis Kudla.
• Juan Martin del Potro beat Karen Khachanov in four sets, but seventh seed David Goffin went out against Julien Benneteau.

So along with constant weather updates/moans, here's what else you can expect from us in Melbourne's night session.

World number one Simona Halep faces Eugenie Bouchard of Canada on Margaret Court Arena from 08:00 GMT.

Defending men's champion Roger Federer plays Jan-Lennard Struff of Germany in the final match on Rod Laver Arena.

We'll bring you live text and radio commentary on both, plus updates from matches involving Alexander Zverev - the men's fourth seed - and former champion Stan Wawrinka.

Image source, Getty Images

This is exactly what you want to see if you're waking up in snow-covered, wind-swept, sodden Britain.

Jealous? Moi?

Image source, Getty Images

And after that surprise defeat for British number one Johanna Konta at a sizzling hot and windy Melbourne Park, it's time for us to take a breather...

Don't forget, Tennis Breakfast is back on BBC Radio 5 live sports extra from 07:00 GMT, when no doubt the team will dissect Konta's early exit, as well as keeping you right up to date on the rest of today's play.

Keep your eyes peeled for updates on the BBC Sport website for the best of the action from day four of the Australian Open, including Novak Djokovic against Gael Monfils and Simona Halep's second-round meeting with Eugenie Bouchard.

Time for a cool down and a cuppa...

Maria Sharapova has beaten Anastasija Sevastova, winning a second-set tie-break to secure a 6-1 7-6 (7-4) victory.

The Russian was broken when serving for the win at 5-4 but, no matter, she moves on to round three.

Eighth seed Caroline Garcia is locked at 3-3 in the final set against Czech Marketa Vondrousova.

In the men's event, fifth seed Dominic Thiem is in big bother - he's just gone down two sets to love against American Denis Kudla.

Another American in trouble is 13th seed Sam Querrey, who is two sets down to Hungarian world number 85 Marton Fucsovics. However, Querrey is 3-2 up in the third.

Image source, AFP

As for Bernarda Pera, the American will go on to face 23rd seed Barbora Strycova in the last 32.

The Czech beat Spain's Lara Arruabarrena 6-3 6-4 in the second round.

Image source, Reuters

Johanna Konta looked out of sorts on court two.

The British number one slipped in the first set, but was quickly back to her feet and seemed to be fine.

There has been plenty of chat about the heat at Melbourne Park today, but it was a strong wind causing Konta problems in the second set.

She completely misjudged a serve at one point following a big gust, before losing her footing in bizarre fashion as Bernarda Pera broke to go 6-5 up.

Bernarda Pera, in her first Grand Slam, had three match points at 5-4, before Johanna Konta recovered to hold serve and then break back.

But the American broke the ninth seed's serve again a game later, before sealing her passage into the next round

"I was more nervous to serve out the first time, the game on 5-4," said Pera.

"I felt a little less nervous at 6-5 and am so happy I was able to finish it."

Russell Fuller
BBC tennis correspondent at Melbourne Park

I think there are genuine concerns at how Johanna Konta's game has dipped since Wimbledon. She has three wins from her last 11 matches, stretching back to August.

Here is the winner, Bernarda Pera, who only made the main draw as a lucky loser having been defeated in qualifying.

Now she's on her way to the last 32...

"I was ready to leave on Monday," said Pera. "When I got in I was so excited and to win two rounds is amazing."

So that's Johanna Konta out, a straight-set defeat to the world number 123 in one hour and 40 minutes.

Who saw that coming?

David Law
Radio 5 live sports extra commentator at Melbourne Park

Konta would have expected to have worn her down. She struggled to impose herself and didn't frighten Pera. It was a fairly comprehensive victory in the end.

Naomi Broady
British number three on BBC Radio at Melbourne Park

Konta missed a few today and the sun was definitely a factor, two off the frame and that serve when the wind really picked up.

Image source, Getty Images

That wind is really something. But Bernarda Pera seems to be dealing with it OK.

She sees off a grunt-fueled Johanna Konta response with a whipped forehand to go 30-0 up.

Another confident point from the American. Another winner and that's three match points...

Naomi Broady
British number three on BBC Radio at Melbourne Park

She almost sat down, I'm not sure what happened there.

Three break points. Konta misjudges the flight of the ball in the sun and takes more air than tennis ball...

But the Briton rallies back. 30-40. Can she cling on in there? No, Konta slips on the baseline as a Pera return trickles beyond her.

Konta is looking at the umpire, there was a huge gust of wind... but that was bizarre, both the ninth seed's feet seemed to just go from beneath her?