Third seed Alexandrova claimed a comfortable 6-1 7-5 win in 80 minutes to setup a meeting with Clara Burel, who clinched a surprise 6-3 6-1 win over Varvara Gracheva despite being ranked 56 places below her opponent.
Kristyna Pliskova was knocked out following a hard-fought 7-5 6-4 loss to Alize Cornet.
Cornet's reward is a tie with eighth seed Magda Linette, who triumphed 6-2 6-0 in a one-sided match against Nao Hibino.
The result, paired with Iga Swiatek's third-round win on Friday, also means that two Polish female players are through to a grand slam fourth round for the first time in the Open Era since 2008, when Marta Domachowska and Agnieszka Radwanska both reached the same stage of the same tournament.
Indeed, Linette also became just the fourth female Polish player to reach the last 16 at a grand slam in the Open Era after Domachowska, Radwanska and the current world number one Swiatek.
Linette – who had lost each of her previous six grand slam third-round matches – recovered from a break down in the first set against the number 19 seed, while the second went very differently.
The world number 45 raced out to a 4-0 lead and seemed on course to finish the job quickly, before Alexandrova fought back to 5-4.
Linette kept her nerve to serve out the win and set up a fourth-round clash against fourth seed Caroline Garcia, who came from a set down to defeat Laura Siegemund.
The unseeded Pole beat fourth seed Garcia 7-6 (7-3) 6-4 on Rod Laver Arena on Monday to move into the last eight for the first time.
Linette had never been beyond the third round of a major before this tournament, but she will face Karolina Pliskova for a place in the semi-finals.
The world number 45 will celebrate her 31st birthday next month and feels she is benefitting from being more mature after breaking new ground in her 30th main-draw appearance at a grand slam.
She said: "We worked a lot actually about my emotional management. I think dealing with some kind of losses, but not necessarily match losses, just even throughout the match losses, like small mistakes here and there.
"I think I've never really dealt with them very well. They carried over later on for next point, then another one. It was taking me just too long to get over them.
"I think of course we work so much on my game. We worked a lot on changing the directions and the depth of the ball.
"But I think this approach of really trying to look a little bit different, grow up a little bit emotionally, like that was a big thing for us as a team. All of us approached it. It wasn't only me, but it was the coaches that brought this to me."
Asked how she works on emotional control, Linette added: "I think it's just how do you try to approach the defeats and the mistakes, and are you making the right mistakes, can you then recognise it and move on and deal with them a little bit better. I think I was just getting too negative and too harsh on myself because I feel I'm quite demanding.
"On the other hand when you try to go to that other spectrum, when you're okay with everything, it's also not the best. You really need to stay on top of things and be proactive with it, which ones you're doing good and not.
"I think recognising it, you try again and again and again. Eventually you start recognising which ones were the right ones to deal with.
"It's very difficult. I'm [almost] 31 and I'm just getting it right, so obviously it was one of the toughest things for me. But I'm happy. I'm happy that I have this opportunity, that actually I tapped into something that finally I'm breaking something that you can't really measure it in any way. For me, it was something really difficult to change."
World number one Iga Swiatek was expected to be flying the flag for Poland deep into the tournament, but after her surprising exit it is now the 30-year-old Linette who will try to step up and go all the way.
Having never advanced past the third round at any of her previous 29 grand slam appearances, Linette has now hit a remarkable run of form that includes consecutive wins over world number 19 Anett Kontaveit, world number 18 Ekaterina Alexandrova, and world number four Caroline Garcia.
Against Pliskova – a former world number one – Linette capitalised on some sloppy play as her Czech opponent committed an uncharacteristic 36 unforced errors with only 18 winners.
Pliskova also committed seven double-faults, leading to a meagre 58 per cent success rate (34-of-59) from her service points, while Linette converted at a 70 per cent clip (45-of-64).
Speaking on the court immediately after her triumph, Linette said: "I will never forget this. This is the first time ever I'm breaking through some really difficult things for me. This will stay with me for life, so I'm really grateful and super happy for the support."
Linette will face the winner between Aryna Sabalenka and Donna Vekic in the semi-final, while Elena Rybakina and Victoria Azarenka will battle it out for the other spot in the decider.
One year on from being near the lowest ebb of her career, struggling to hit a serve into court, Sabalenka is a changed player after working on the biomechanics of her game.
Three times a losing grand slam semi-finalist, she got over that hurdle for the first time by beating Magda Linette 7-6 (7-1) 6-2 in Thursday's second semi-final, setting up a title showdown with Elena Rybakina on Saturday.
Hard work has brought about this change in Sabalenka, who was stacking up double-figure match totals of double faults as a matter of course in the early stages of last season.
There was work with a psychologist in the background, too, but Sabalenka feels that has run its course, and that nobody understands her better than herself.
It is a gamble, but it also seems to be paying off handsomely.
The 24-year-old fifth seed said: "To be honest, I decided to stop working with a psychologist. I realised that nobody other than me will help, you know?
"In the pre-season I spoke to my psychologist saying, 'Listen, I feel like I have to deal with that by myself', because every time I'm hoping that someone will fix my problem, it's not fixing my problem.
"I just have to take this responsibility and I just have to deal with that. I'm not working with a psychologist any more. I'm my psychologist."
The experiment is working just fine so far, with Sabalenka having a perfect run through her first 10 matches of the year, picking up an Adelaide International title and powering through the grand slam rounds in Melbourne.
She has yet to drop a set this season, and now a first grand slam singles title is tantalisingly close.
Wimbledon champion Rybakina stands in her way, with Sabalenka disclosing she mostly ignored the grass-court slam last year after Russian and Belarusian players were banned from competing.
"I didn't watch Wimbledon last year. I was feeling really bad about that, and I didn't watch Wimbledon at all," the Belarusian said.
"A little bit the final just because I was working out in the gym. I saw a little bit. It was great tennis."
Sabalenka, who is not known for hiding her emotions, appears to be on a sturdy keel in Australia and said she kept the celebrations low-key after beating Linette because "there is one more match to go".
She has won all three of her past matches against Rybakina, but they all came before the Kazakhstani became a major champion.
It is Rybakina who carries the experience of winning in a slam final into Sunday's trophy match, which can be seen as an advantage.
The psychologist lurking within Sabalenka has delivered impressive results so far, and the on-court focus she has demonstrated suggests the woman from Minsk is unlikely to lose any mental battle.
"To be honest, I think I'm not going to do something extra," Sabalenka said. "I think it's okay to feel a little bit nervous. It's a big tournament, a big final. If you're going to start trying to do something about that, it's going to become bigger, you know?
"I'll just leave it like that. It's okay to feel nervous. She's playing great tennis, serving well. I just have to be there and have to work for it and put her under pressure. Yeah, that's it."
The 24-year-old fifth seed triumphed 6-3 6-2 over Donna Vekic to secure a berth in the semi-finals where she will face unseeded Pole Magda Linette.
Sabalenka won the Adelaide International title prior to the Melbourne Open, meaning she has won her past nine matches without dropping a set.
Wednesday's win improved Sabalenka's grand slam quarter-final record to 4-0, but her major semi-final record is a different story, currently 0-3, despite winning the first set in all three.
Sabalenka made the US Open semi-final last year where she lost to top seed and eventual winner Iga Swiakek. The Belarussian also made the semis at Flushing Meadows in 2021, going down to unseeded Canadian Leylah Fernandez, while she lost her 2021 Wimbledon semi-final to eighth seed Karolina Pliskova.
"I feel a little bit different," Sabalenka told reporters. "I think that I lost those three semi-finals just because I wasn't really calm on court.
"I was overdoing things. I really wanted to get this slam. I was rushing a lot. I was nervous a lot. Screaming, doing all this stuff.
"Right now, I'm a little bit more calm on court. I think I really believe that this is the only thing that was missing in my game. If I can keep that focus and that calm on court, I can get through it.
"I just feel like I have more believe in myself. I feel like this is the huge difference."
The powerful Sabalenka utilized her forehand brilliantly against Vekic with 38 winners, while she kept her cool, saving 12 of 14 break points.
When asked how she is staying focused, she added: "I'm just trying to look at the situation from the top, to see, for example I'm up with a break, and even if she's going to break me back, nothing bad going to happen. You are just going to keep serving well.
"I'm just trying to look at the situation from the top, try to relax myself, try to think what I have to do."
Sabalenka's run to the Australian Open last four sets up the opportunity of a first-ever all-Belarussian grand slam final, with compatriot Victoria Azarenka into the other semi-final, where she will face Wimbledon champion Elena Rybakina.
"I really want it to happen," she said. "I know that Vika will do everything she can to make it happen. I will do everything I can to make it happen.
"That's going to be history. That's going to be just unbelievable and tough to realise that this is actually happening.
"It's just going to be huge. This is going to help other kids to understand that they can do well in this sport, they can be top players."
Only a year ago, Sabalenka's game was in crisis as she struggled horrendously with serving yips, but now a first grand slam singles title match awaits the Belarusian.
She scored a 7-6 (7-1) 6-2 victory over unseeded Polish player Linette on Rod Laver Arena, recovering from going an early break down in the first set before taking command of the contest.
Trailing 2-0 and 30-all on serve, Sabalenka ripped a brilliant forehand winner on the run and yelled "Come on!", looking to gee herself up. It did the trick as she won the game to gain a foothold, then came from 40-0 behind in Linette's next service game to break back.
Neither player had a further break point before the tie-break, which fifth seed Sabalenka dominated, before racing 4-1 ahead in the second set.
The 24-year-old, facing an opponent six years her senior, gave Linette precious little hope of a comeback. Linette admirably staved off three match points at 5-1 down, holding serve to keeping Sabalenka waiting, but the deepest grand slam run of her career is over.
Now opportunity knocks for Sabalenka in the biggest match of her life at the weekend, her 20th WTA-level singles final, with Wimbledon champion Rybakina standing in her way.
Data slam: Taking a straight line to glory
Sabalenka has won 10 out of 10 matches in 2023 so far, landing a title in Adelaide before embarking on this run in Melbourne. More impressive than that is all the wins have come in straight sets. She had lost three slam singles semi-finals leading up to this Linette clash, but now that hurdle has been cleared.
ACES/DOUBLE FAULTS
Sabalenka – 6/2
Linette – 1/1
WINNERS/UNFORCED ERRORS
Sabalenka – 33/25
Linette – 9/16
BREAK POINTS WON
Sabalenka – 3/7
Linette – 1/4
Third seed Bencic needed just 88 minutes to see off her 36th-ranked opponent as she made it 15 victories from her past 18 matches.
Czech wildcard Tereza Martincova is also through to the last eight on home soil after battling past French Open finalist Anastasia Pavlyuchenkova 7-6 (7-5) 7-6 (8-6).
Martincova is into her fifth quarter-final of the season and will take on number four seed Maria Sakkari, who saw off Jelena Ostapenko 6-4 6-2 earlier on Thursday.
Also through to round three is Elena Rybakina following a hard-fought 6-3 2-6 6-1 win over qualifier Magda Linette, while Jil Teichmann – who shocked former world number one Angelique Kerber in the previous round – advanced in three sets against Alison Riske.
She will face Petra Kvitova for a place in the semi-finals.
World number eight Bertens defeated teenage qualifier Anastasia Potapova 6-4 7-6 (7-3) having staved off three set points in a second set in which she was 5-2 down.
Bertens will face Ekaterina Alexandrova next after she was handed a walkover when third seed Kvitova withdrew.
Top seed Belinda Bencic was ousted by Maria Sakkari in three sets, with Elena Rybakina beating Oceane Dodin in the other quarter-final.
At the Thailand Open, world number four Elina Svitolina suffered a surprise straight-sets loss to Nao Hibino, who was joined in the semi-finals by Magda Linette, Patricia Maria Tig and Leonie Kung.
Bertens became the first player to win back-to-back titles in St Petersburg, easing to a 6-1 6-3 victory over eighth seed Rybakina.
World number eight Bertens, who was due to face the returning Kim Clijsters in the first round of the Dubai Tennis Championships before withdrawing this weekend, was in tears after losing just one set this week to claim a 10th WTA title.
She saved all five break points she faced, securing a first title this year.
"I never expect any match to be easy. It didn't feel easy, of course, even though the scoreline was. At the end, I felt a little bit nervous, but I was just happy to close it out," second seed Bertens said.
"I just tried to approach every point the same, no matter what the score is. Sometimes, on a break point, you go for a little more on serve, and that's what I did today."
Linette sealed the second WTA Tour title of her career with a 6-3 6-2 defeat of qualifier Leonie Kung in Hua Hin.
Teenager Kung, playing in the main draw of an event at this level for only the second time, failed to break Linette's serve and was made to pay for being unable to hold on three occasions.
Raducanu, who is still only 20, won at Flushing Meadows as a qualifier in 2021 – a grand slam first in the Open Era.
However, the British number one has not been past the second round of a major since, with that victory over Leylah Fernandez in New York remaining her only final appearance at any WTA Tour event.
A succession of injuries have hampered Raducanu, who played only 34 matches in 2022 and had been restricted to just four this year ahead of the Indian Wells Open.
Raducanu has beaten Danka Kovinic and Magda Linette in straight sets in California, however, for her first back-to-back wins since the Korea Open in September – the last of those also coming against Linette.
Even in winning on Saturday, Raducanu required treatment for an apparent wrist injury, although she described the problem as "manageable".
It was put to the luckless Raducanu afterwards that she might be well served employing "somebody to sweep the whole area around you for black cats and stray ladders", yet she has come to terms with her misfortune.
She said with a smile: "Sometimes you wonder, like, how is this possible? But then very quickly I think you create your own luck.
"It works both ways. I won the US Open as well, and I think I also have to take the bad luck sometimes, because also good fortune has also come upon me.
"I think that I wouldn't trade that title for the world. I'm just prepared to take whatever it takes, knowing that I have that in the bank."
Asked about her mood after winning consecutive matches, Raducanu said: "I just feel good with the way I'm working with my team, not getting too overly pleased or too down.
"I'm just plodding away. I feel pretty good about how things are going."
Raducanu faces Beatriz Haddad Maia, the 13th seed, in round three.
Top seed Barty required medical attention during her first-round win over Bernarda Pera two days earlier, with a hip injury the cause for concern.
The 25-year-old – back at Roland Garros for the first time since winning her maiden grand slam title in Paris in 2019 – vowed to "play through the pain barrier", yet the injury prevented her from continuing when 1-6 2-2 down against her Polish opponent, who will face Ons Jabeur in the next round.
The Australian's retirement throws the draw wide open, with both of the top seeds now out after Naomi Osaka decided to withdraw amid her disagreement with tournament organisers.
Barty's clay-court season ended with a title in Stuttgart, a runner-up finish in Madrid and an appearance in the quarter-finals in Rome, and she could scarcely hide her disappointment at the way things ended for her in the French capital.
"It's heartbreaking," she told a media conference. "I mean, we have had such a brilliant clay-court season, and to get a little bit unlucky with timing and have something acute happen over the weekend and just kind of run out of time against the clock is disappointing.
"It won't take away the brilliant three months that we have had, as much as it hurts right now.
"We did everything, absolutely everything we could to give myself a chance. It was a small miracle that we were able to get on court for that first round.
"I just tried to give myself a chance and see how it felt. Obviously practicing, we've had our restrictions and essentially tried to stay as fresh as possible and not aggravate it in any way, but in a match that's unavoidable at times.
"It got worse today and it was becoming at the stage where it was unsafe. As hard as it is, it had to be done. Right from the first game, I was battling the pain, and it just became too severe."
SVITOLINA CRUISES THROUGH, PLISKOVA DUMPED OUT
Fifth seed Elina Svitolina booked a third-round meeting with Barbora Krejcikova after seeing off Ann Li 6-0 6-4.
Svitolina landed 74 per cent of her first serves and struck 10 winners to cruise past the American in the opening set.
Li bounced back in the second, roaring into a 4-1 lead, but Svitolina clawed her way back to ensure she reached at least the third round in seven of her nine appearances at Roland Garros.
Svitolina, who overturned a 2-5 deficit in the second set to beat Oceane Babel in the first round, said: "In the end, what I'm really happy with is the way that I was down in both matches in the second set and found a way.
"I found a good level and didn't give up on the second set. That was a really good point for me, and I was really playing composed in both matches. It was two different players, but I was really happy that I could win in two sets in both matches."
Up next is Krejcikova, who overcame Ekaterina Alexandrova 6-2 6-3.
There is no place in the third round for ninth seed Karolina Pliskova, who was soundly beaten 7-5 6-1 by Sloane Stephens, while number 13 seed Jennifer Brady battled past Fiona Ferro 6-1 1-6 6-4.
KENIN WINS BATTLE OF THE AMERICANS
Fourth seed Sofia Kenin defeated fellow American Hailey Baptiste, a qualifier who won four matches in Paris on her French Open debut, 7-5 6-3.
Kenin will now face another compatriot in 28th seed Jessica Pegula, who beat Tereza Martincova 6-3 6-3.
Elsewhere, defending champion Iga Swiatek thumped Rebecca Peterson 6-1 6-1, Coco Gauff got the better of Wang Qiang 6-3 7-6 (7-1), and Elise Mertens edged out Zarina Diyas 6-4 2-6 6-4.
Jabeur arrived at Roland Garros with the expectation she would be one of the most likely to challenge strong favourite Iga Swiatek, but Linette consigned the sixth seed to a 3-6 7-6 (7-4) 7-5 defeat on Sunday.
Battling Tunisian Jabeur won her maiden WTA 1000 title at the Madrid Open this month and had reached the final of three of the four tournaments she has played on clay this season.
The 27-year-old also started the Paris major with a tour-leading 17-3 record on this surface in 2022, but she was unable to get the better of the world number 56.
Linette was broken three times in the first set, but fought back from 3-1 down in a second-set tie-break to take Jabeur the distance.
It appeared a final-set tie-break would be on the cards in the opening match on Court Philippe-Chatrier, but Linette had other ideas.
The Pole - who struck 32 winners - decisively broke for a third time when Jabeur was serving to stay in the match to claim her first top-10 scalp of the season, setting up a second-round meeting with Martina Trevisan or Harriet Dart.
A junior French Open champion in 2011, Jabeur must lick her wounds after 47 unforced errors to fall at the first hurdle.
Barty required medical attention during her first-round win over Bernarda Pera two days earlier, with a hip injury a cause for concern.
The 25-year-old – back at Roland Garros for the first time since winning her maiden grand slam title in Paris in 2019 – vowed to "play through the pain barrier", yet the injury proved too much to deal with on Thursday.
Barty's retirement throws the draw wide open, with both of the top seeds now out after Naomi Osaka decided to withdraw amid her disagreement with tournament organisers.
Barty's discomfort seemed evident from the off, though Linette did have to fend off an immediate break point to hold in the first game.
The Australian had to claw back three break points on her first serve, however, and a double fault in game four handed Linette the first break, with Barty clearly struggling when attempting to twist to her right.
A lame backhand into the net gifted Linette another break, and the Pole served out the set at the first time of asking with just 36 minutes on the clock.
After a lengthy delay in which she received treatment both on court and back in the changing rooms, Barty returned with seemingly renewed vigour to hold the first game of set two with relative ease.
Linette, though, kept her composure, with a couple of aces helping her level things up, and despite winning the next game thanks to her speed of serve, Barty was grimacing again.
Some excellent returns from Barty kept Linette at bay, but the world number 45 struck a powerful serve down the middle to make it 2-2, and that proved the final straw for her opponent, who shook hands at the net and, with a wave to the crowd, trudged down the tunnel.
DATA SLAM: BARTY'S BRAVE FACE NOT ENOUGH
Linette has claimed one of the biggest wins of her career, though the 29-year-old would have wished for it to come in more glorious circumstances. Barty tried her best to continue, but the injury was having too much of an impact on the key parts of her game – she made four double faults to Linette's zero, and tallied up 18 unforced errors, double the amount of her opponent.
WINNERS/UNFORCED ERRORS
Barty – 9/18
Linette – 12/9
ACES/DOUBLE FAULTS
Barty – 2/4
Linette – 4/0
BREAK POINTS WON
Barty – 0/1
Linette – 2/7
Hurkacz made it through a tough encounter against Stan Wawrinka 7-6 (7-5) 6-4 to give Poland a 2-1 lead in their Group B tie with Switzerland in Brisbane, before Linette came from behind to beat Jil Teichmann 5-7 6-4 6-1 to clinch it.
Poland will face Italy in the Brisbane final, whose 5-0 whitewash of Norway included Matteo Berrettini sealing victory with a 6-4 6-4 win over Casper Ruud.
In Perth, Croatia advanced to the City Finals after a dramatic day that saw Caroline Garcia get France on the board with a straight sets win against Petra Martic, before Adrian Mannarino came from a set down against Borna Gojo to serve for the match as he looked to bring his country level at 2-2.
However, Gojo broke back in a tense encounter before winning a deciding tie-break to send Croatia through to face Greece, who sealed a 4-1 win against Belgium.
Stefanos Sakellaridis recovered from going a set behind to beat Zizou Bergs, before Maria Sakkari overcame Elise Mertens 6-1 7-5, with Sakkari and Stefanos Tsitsipas adding some gloss to the score with a mixed doubles success against Kirsten Flipkens and Michael Geerts.
Spain and Australia were unable to progress but the hosts at least had the consolation of securing a victory thanks to wins for Jason Kubler against Albert Ramos-Vinolas, and the mixed doubles duo of John Peers and Sam Stosur against Jessica Bouzas Maneiro and David Vega Hernandez.
The USA had already secured their Finals berth against Great Britain in Sydney, but were ruthless as they finished off their tie against Germany to win 5-0.
After Jessica Pegula beat Laura Siegemund 6-3 6-2, Frances Tiafoe also defeated Oscar Otte in straight sets, before the American duo combined to beat Siegemund and Daniel Altmaier 6-7 (5-7) 6-4 10-7 to complete a clean sweep.
Jabeur – who reached the semi-finals of the Volvo Car Open – made a winning start at the WTA 250 event after toppling Stefanie Vogele 6-4 6-1.
The Tunisian won 88.9 per cent of her first serves to set up a clash with qualifier Alycia Parks – the latter eased past fellow American Grace Min 6-1 6-4.
However, second seed Linette crashed out at the hands of in-form Colombian Maria Camila Osorio Serrano.
Osorio Serrano, who claimed her maiden singles title at the Copa Colsanitas in Bogota last week, upstaged Linette 6-3 4-6 7-5.
Elsewhere, 15-year-old wildcard Linda Fruhvirtova – in just her second WTA main-draw appearance – progressed 6-2 6-7 (7-9) 4-4 after fourth seed Alize Cornet retired in the final set.
Linette took just 31 minutes to win the first set in Rome, but world number 10 Kvitova responded superbly to win 1-6 6-0 6-2.
Two-time grand slam champion Kvitova racked up 16 unforced errors in the first set, yet rallied like the great competitor she has proved to be for so long to ensure she will face Vera Zvonareva - conqueror of Christina McHale - in the second round.
The 11th seed from the Czech Republic said: "The first set I started very badly. I was missing almost everything. On the court... [the ball] was bouncing everywhere as well. A little bit windy. I just had to get used to probably everything.
"The beginning of the second set when finally I held my serve and broke her serve, I think since then it was much, much better."
French Open champion Iga Swiatek advanced when Alison Riske retired at 5-4 down in the first set due to a recurrence of a left foot injury.
Swiatek, who will take on Sloane Stephens or Madison Keys in the second round, made 18 unforced errors but had won four games in a row from 4-1 down when the American was unable to continue.
Coco Gauff battled past Yulia Putintseva 7-5 4-6 6-4 to set up a meeting with 17th seed Maria Sakkari - who fended off qualifier Polona Hercog 7-6 (8-6) 3-6 6-2.
Amanda Anisimova will do battle with Elina Svitolina, a winner of this tournament twice, after defeating Wang Qiang 7-5 6-3. Jessie Pegula, Jennifer Brady and Petra Martic were among the other winners on day one.
Four of the seeded players have now fallen at the first hurdle in Cluj, with Lucia Bronzetti also joining Linette, Ana Bogdan and Marta Kostyuk in suffering early exits.
Fifth seed Linette was beaten 6-2 6-4 by Wang, while ninth seed Bronzetti went down 4-6 6-2 6-4 against world number 89 Dalma Galfi.
Anna Bondar is through to the quarter-finals, though, with the eighth seed enjoying a 7-6 (7-3) 6-4 victory over Harriet Dart.
Jasmine Paolini took just 58 minutes to wrap up a resounding 6-4 6-1 win over Dayana Yastremska.
Next up for the Italian is a last-eight showdown with Wimbledon quarter-finalist Jule Niemeier, who overcame Kamilla Rakhimova 6-4 6-4.
Linette and Frech, ranked 48th and 57th respectively by the WTA, will both take part in the Olympic singles tournament at Roland-Garros, for which four-time French Open champion Swiatek is the firm favourite.
While Swiatek has been drawn to face Romania's Irina-Camelia Begu in the first round, Linette will face Mirra Andreeva and Frech is set to take on Bulgaria's Viktoriya Tomova.
Before then, though, the latter duo will go head-to-head in the final of the Prague Open.
Both overcame home favourites to advance to the showpiece match in Czechia, Linette beating first seed Linda Noskova 6-3 3-6 7-6 (7-2).
Frech, meanwhile, benefitted from a walkover against 16-year-old Laura Samsonova, the former Wimbledon girl's champion being forced to retire while down 3-6 6-0 4-2.
Frech, who is yet to win a WTA Tour-level title, won the only previous meeting between the pair in the Saint Malo quarter-finals in 2022, triumphing 7-5 6-7 (2-7) 6-2.
Linette, who beat Viktoriya Tomova and Linda Noskova on her way to the final, won in straight sets 6-2 6-1 as she now heads to Paris to face Mirra Andreeva.
The world number 41 was in the ascendency from the off, forcing a break in the fourth game and never looking back.
Despite the best efforts of Frech, who saved one set point, Linette continued to apply the pressure and another break put her a set up.
Linette would again break in the fourth game of the second set, winning three games on the bounce to secure her first career win over her compatriot.
Data Debrief: Linette prevails in first all-Polish affair
The final in Prague between Linette and Frech was the first all-Polish WTA level final in the Open Era.
Linette's triumph over her opponent was her first, having lost in the pair's previous encounter in Saint-Malo back in 2022.
During the contest, the world number 41 gave nothing away, saving all four of the break points she faced while converting three of the seven she had against Frech.