Mirra Andreeva rallies from 5-1 down in deciding set to pull off ...

Russian teenager Mirra Andreeva has staged the comeback of the day at the Australian Open, rallying from 5-1 down in the deciding set to deny Frenchwoman Diane Parry 1-6 6-1 7-6 (10-5) in a match tiebreaker.

Key points:Mirra Andreeva has capped her second remarkable win in as many days with a 1-6 6-1 7-6 (10-5) win over Diane PerryAndreeva fought back from 5-1 down in the final set to progress to the fourth roundThe 16-year old will play either Australian qualifier Storm Hunter or Czech ninth seed Barbora Krejcikova in the fourth round

Andreeva staved off a slow start and survived a match point late en route to toppling Parry in an epic, back-and-forth encounter. 

It's the second dramatic victory in as many days for Andreeva after she demolished her mentor, sixth seed Ons Jabeur, in straight sets. 

Andreeva, who has fast become one of the most exciting prospects on tour, carried the goal of simply sharing the practice court with Jabeur into the tournament.

But now she's powered into the fourth round where the 16-year-old will play either Australian qualifier Storm Hunter or Czech ninth seed Barbora Krejcikova, who clash at Rod Laver Arena in Friday night's final match

Meanwhile, Amanda Anisimova has returned to tennis with new-found perspective and purpose — and that could spell trouble for defending Australian Open champion Aryna Sabalenka.

Fresh off a six-month mental health break, Anisimova continued her impressive comeback to take out practice partner and former world No.2 Paula Badosa in straight sets on Friday to be the first woman through to the fourth round.

The former teenage prodigy overcame some early serving woes and a big first-set deficit to carve out a 7-5 6-4 third-round victory on John Cain Arena.

The victory vaulted the 22-year-old into the second week at Melbourne Park for the third time, backing up her efforts from 2019 and 2022.

After reaching the French Open semifinals as a 17-year-old, then making the quarters at Wimbledon in 2022, Anisimova took a hiatus last May citing mental health issues and burnout fears for the break.

The time out has worked wonders.

"It's quite unbelievable," she said of her latest Open charge.

"After taking some time off, I'm feeling really good and the most important thing is that I'm enjoying my time out here.

"Taking a step away and just really being at home and resetting myself; it gave me a different perspective going into these tournaments.

"I'm really trying to be present when I'm here. Having that is a huge advantage for me now."

Playing on her special ranking of No.61, despite slipping officially to 442nd in the world, Anisimova shapes as a huge last-16 threat to Sabalenka.

The Belarusian world No.2 quickly followed the American into the fourth round with a merciless 6-0 6-0 win over Ukraine's Lesia Tsurenko.

Sabalenka needed just 52 minutes to march on, and has dropped only six games in three one-sided victories en route to the second week.

"I'm just super-happy with the level I'm playing so far and hopefully I can just keep going like that, or even better," she said.

Sabalenka and Anisimova will clash for a place in the quarterfinals on Sunday.

With a 4-1 winning record over the titleholder, including victories over Sabalenka at the Australian and French Opens, plus another prized scalp in Melbourne in 2022 of two-time champ Naomi Osaka to her credit, the grand slam giant-killer isn't feeling overawed.

"I'm really happy that I was able to get this far, but I can do more," Anisimova said.

"(Sabalenka) is an amazing competitor. She's had a great year. I know she's going to be coming in hot, playing well. So I'm expecting a really good match.

"We're both very big hitters, so it always ends up being an enjoyable match to watch and also for us to play.

"I'm really looking forward to it."

Like Anisimova and Sabalenka, reigning US Open champion Coco Gauff is also through to the last 16 without having dropped a set after crushing fellow American Alycia Parks 6-0 6-2 in 61 minutes.

Fourth-seeded Gauff awaits the winner of the meeting between Poland's Magdalena Frech and Russian qualifier Anastasia Zakharova.

AAP/ABC