Swiatek opens her next service game with a double fault and that is compounded by a flying Collins winner to put the 20-year-old under further pressure at 0-30.

Collins gets an unlucky break off a net cord before playing a superb point to put Swiatek on the back foot and dispatch the backhand volley.

Swiatek saves the first of two break points but a loose forehand off the back of a second serve hands Collins the immediate break - and she will serve for the set next.

Swiatek gets a slight look at Collins’ service game as the American pushes a forehand long - only for the 27th seed to win the next couple of points by attacking the net.

Swiatek fires a clean winner off a Collins serve to get to 30-30 before she returns well off a Collins first serve before taking control of the rally and forcing Collins into the error.

It brings up break point, but Collins shuts it down with a backhand out wide, only to drop a double fault on the next point. Swiatek lets out a roar as she puts away a forehand volley to get the break - she’s back in this.

Collins attacks a Swiatek second serve before the Pole nets on a forehand to bring up 30-30. Swiatek responds well as she kicks a second serve out wide before following it up with a winner out wide, only to drop the next point with a double fault.

She lets out a sigh of relief as a Collins forehand drops long of a baseline, and Swiatek gets on the board with her first hold of the match.

Swiatek makes a couple of imposing returns but Collins is able to quickly gain control of the rallies thanks to her power. The American secures a comfortable hold to consolidate the double break.

Wow - what an electric start from Danielle Collins! She races into an opening break of serve as she attacks Swiatek from the start and holds to 15 following a flash of winners.

The American ramps up the pressure against on Swiatek as she attacks her serve to set up two further break points. Swiatek saves the first - but is forced wide by Collins and can’t keep the backhand in court.

That’s an incredible start - a double break in a blink of an eye.

This was how Swiatek sealed her quarter-final victory over Kaia Kanepi. She is a special player, but faces a big test in Danielle Collins today.

Iga Swiatek will look to advance to the second Grand Slam final of her career when she takes on Danielle Collins next on Rod Laver.

The 20-year-old, who made a sensational breakthrough when she won the French Open in 2020, battled through three-set epics against Sorana Cirstea and Kaia Kanepi but says she is taking the positives out of winning despite not playing at her best level.

“Right now, I have more belief even when I don’t start the match well,” Swiatek said. “I’m proud of myself that I’m still able to find solutions and actually think more on court on what to change, because before it wasn’t that clear for me.

“So I feel like it’s part of the work that we have been doing with Daria to control my emotions and just maybe actually focus on finding solutions.”

“It’s unreal,” says Barty after reaching the Australian Open final. “It’s incredible. I love this tournament and coming out here and playing in Australia. I’m just happy I get to play my tennis here. I enjoy it, I’ve done well before and I’ve got the chance to compete for the final. It’s unreal.

[On Madison Keys] "It's so nice to see her back where she belongs. She is an amazing human being but the thing I love most about Maddie, no matter what happens on the court, she looks you in the eye, gives you a good handshake. I just love that about her. We really respect her and we love her."

[On Aussie success] “Dylan Alcott is at the forefront of that. He’s inspired the whole nation and he’s inspired the globe. We were watching his match today and when he was giving his acceptance speech we were all crying. The way he and the Australian Open have worked together is incredible.”

[On Swiatek vs Collins] “Both of them are different in how they play. They’re both exceptional, that’s why they are here. They find a way to win even if they’re not playing their best. It’s going to be a hell of a match. I’ll come out here on Saturday with a smile on my face, try to enjoy it and see what happens.”

That was too good from Barty - it’s hard to say anything else. She has now taken 12 consecutive sets at the Australian Open and the world number one has only dropped serve once in reaching the final. Keys struggled in the opening set but Barty came under some pressure in the second, facing break point while the match was on serve, but came through the test in superb style, and in a little more than an hour.

The reaction from Barty was calm as she greeted Keys at the net. Despite all the pressure that is on her shoulders, she is doing a remarkable job of not letting it show.

Brilliant from Keys on the opening point! Wonderful defence from the American to return two smashes from Barty, before hitting the winner past the Australian.

Barty recovers thanks to her first serve - quickly taking control of the next two points with Keys coming up with two costly errors.

She maintains the pressure but forcing Keys deep and a backhand from the American that drifts long brings up two match points.

This is it - a first serve from Barty down the middle is followed up with a winner into the corner, and the world number one is through to the Australian Open final!

She becomes the first Australian woman in 42 years to reach the Australian Open final.