Australian Open champion Aryna Sabalenka lost for the first time in 14 matches, and Coco Gauff set up a semi-final clash with Iga Swiatek at the Dubai Tennis Championships on Thursday.

Sabalenka fought back from a set down to end the title defence of Jelena Ostapenko a day earlier, but she came up short against Barbora Krejcikova as her Czech opponent overcame a tough first set to run out a 0-6 7-6 (7-2) 6-1 victor.

Sabalenka, playing in her first event since claiming a maiden grand slam title in Melbourne, romped into the lead by breaking Krejcikova's serve three times to go a set ahead.

But the world number two was pegged back in the second as Krejcikova battled to force a tie-break, which she dominated to level the match.

Krejcikova then completed the shock victory in style, breaking the second seed twice in the final set before clinching the win on her third match point to end Sabalenka's run of 13 straight triumphs.

Karolina Muchova's withdrawal due to an abdominal injury means it is Jessica Pegula who will face Krejcikova in the semi-finals on Friday.

After Swiatek reached the final four by virtue of Karolina Pliskova pulling out because of an illness, Gauff set up a sixth meeting with the world number one by beating Madison Keys 6-2 7-5.

In those five previous clashes between the pair, Gauff is yet to win a set.

But after cruising past Keys, doing so by converting four of five break points and winning 90 per cent of her service games, Gauff is confident of improving her dismal record against Swiatek on Friday.

"All five times, I did something wrong," Gauff said. "To be honest, she's playing great tennis and there's a reason she's world number one. 

"Tomorrow I have no pressure. I just have to play my game. I definitely think I've gotten better since the last time I played her.

"Ranking is just a number at the end of the day. You just have to step on the court believing you can win, and that's what I'm going to do tomorrow."

Australian Open champion Aryna Sabalenka fought back from a set down to end the title defence of Jelena Ostapenko at the Dubai Tennis Championships.

Sabalenka, playing in her first event since claiming a maiden grand slam title in Melbourne, recovered from falling behind in style to win 2-6 6-1 6-1 on Wednesday.

Ostapenko won the tournament last year and looked to be in with a chance of extending her winning streak in Dubai to seven matches.

But Sabalenka launched a strong recovery to reach the quarter-finals and extend a stunning run to start the season to 13 consecutive wins.

The second seed tightened up her game in the second and third sets and will face either Petra Kvitova or Barbora Krejcikova in the last eight.

Sabalenka had been broken three times by Ostapenko in the opening set, but she only had to fend off one break point from there.

"In the first set, she played unbelievable tennis and I couldn't do anything," Sabalenka said.

"I was looking at my team asking like, 'What can I do?', but somehow, I turned around this game and started playing really incredible tennis. 

"She plays really fast, deep balls, and I tried to stay super low, stay focused, and try to put more balls in than she did. I'm so happy that I did it."

A lower back injury for Wimbledon champion Elena Rybakina robbed supporters of what had looked like being a thrilling matchup against Coco Gauff.

The withdrawal of Rybakina meant Gauff progressed via a walkover and will face fellow American Madison Keys next.

Keys and Gauff have played twice before, winning one match apiece.

It was Gauff who won their most recent encounter in the third round of the US Open last year.

Top seed Iga Swiatek had earlier booked her place in the last eight, with the Pole's latest dominant showing in Dubai earning praise on social media from Andy Murray.

And news followed that Karolina Pliskova, her semi-final opponent, had been forced to withdraw.

Swiatek benefited from a walkover in the quarter-finals en route to winning the Qatar Open last week and is now only two wins away from another title.

Iga Swiatek stormed into the last eight at the Dubai Tennis Championships with an emphatic victory over Liudmila Samsonova.

It only took 76 minutes for the number one seed to record a 6-1 6-0 triumph on Wednesday, continuing a fine run after her triumph in Qatar last week.

Swiatek had only narrowly beaten Samsonova in an epic three-set encounter in the Stuttgart semi-finals last year, but was completely dominant this time around at the WTA 1000 event.

Samsonova struggled in recording a first-serve percentage of just 58.5, and Swiatek was ruthless in winning 19 of 22 points on the Russian's second serve.

Swiatek did not even have to fend off a break point in cruising to victory and will play Karolina Pliskova in the quarters.

Pliskova, the two-time grand slam finalist, battled to a 7-5 6-7 (6-8) 6-2 win over Anhelina Kalinina to reach the last eight in Dubai for the fifth time in her career.

There were also two American successes, with Madison Keys needing only 57 minutes to beat Victoria Azarenka, who appeared to be struggling with her movement.

Keys had lost all of her previous four meetings with Azarenka but triumphed 6-2 6-1 in routine fashion.

And Jessica Pegula joined her compatriot in progressing, winning her first career meeting with Ana Bogdan in straight sets.

Elsewhere, 2019 winner Belinda Bencic crashed out, with Karolina Muchova, who also knocked out Maria Sakkari this week, triumphing 6-1 6-4 to book a quarter-final date with Pegula.

Iga Swiatek continued her ruthless form as she progressed with ease to the WTA Dubai Tennis Championships third round on Tuesday.

The world number one cruised to a 6-1 6-1 triumph over 2021 US Open finalist Leylah Fernandez, just three days after winning the Qatar Ladies Open in Doha.

That marked Swiatek's 41st main-draw victory in WTA 1000 events in just her 53rd outing, only Serena Williams and Maria Sharapova (52 each) have won more than 40 such matches in fewer attempts.

The 21-year-old has won her last 35 hard-court matches against opponents ranked outside the world's top 30, though Swiatek said she had to adapt against Canada's Fernandez.

"It wasn't that easy for sure. It was much tougher than the score said," said Swiatek, who will look to make the fourth round for the first time in Dubai when she faces Liudmila Samsonova.

"In the second set ... I needed to go a level up. I didn't have much time to get used to the conditions, but I'm just happy I could play solid tennis."

Jessica Pegula, the third favourite at the tournament, defeated Viktoriya Tomova 6-2 5-7 6-1 to set up a third-round battle with Ana Bogdan, who overcame Shelby Rogers 7-6 (7-3) 6-3.

Fifth seed Coco Gauff coasted past Aliaksandra Sasnovich with a 6-0 6-4 victory, teeing up a meeting with Elena Rybakina, who slammed six aces in a 7-5 6-2 defeat of Marie Bouzkova.

World number two Aryna Sabalenka, who defeated Rybakina at this year's Australian Open final, made light work of lucky loser Lauren Davis in a straight-sets rout as she claimed her 12th straight win in 2023.

Dubai's defending champion Jelena Ostapenko will be the next challenge for Sabalenka after defeating 17-year-old Linda Fruhvirtova for her seventh straight win at the event.

Barbora Krejcikova saved four match points en route to a 6-4 4-6 7-5 win over seventh seed Daria Kasatkina and will meet Karolina Pliskova next after she downed sixth favourite Maria Sakkari in straight sets.

Belinda Bencic and Marta Kostyuk played out the match of the day as the former claimed a 6-7 (7-9) 7-6 (7-5) 6-4 triumph, with that clash taking three hours and 27 minutes – the second-longest on the WTA Tour this year.

Iga Swiatek avenged an early-season loss to Jessica Pegula as she stormed to the Qatar Open title on Saturday, completing a stunning trophy defence.

In three matches, Swiatek surrendered only five games, sealing the title with a 6-3 6-0 victory over American Pegula.

A heavy defeat to Pegula in Sydney at the beginning of the year saw Swiatek reduced to tears, and she then lost in the fourth round of the Australian Open in Melbourne, albeit to eventual finalist Elena Rybakina.

Now Swiatek is back, with brutal wins over Danielle Collins and Veronika Kudermetova – allowing both players just one game each – preceding her dismissal of Pegula in the final.

The 21-year-old has 12 career titles and is off the mark in 2023, extending her head-to-head dominance to 5-2 over world number four Pegula.

Swiatek said: "I don't care how many games are won or lost. I just feel like I really found my rhythm here, and after a tough beginning of the season I could stay focused from the beginning to the end of the matches, and I'm pretty happy with my performance.

"I hope playing well here is going to be a routine."

The world number one sent a message of support during her on-court speech to the people of war-torn Ukraine, for whom she has helped to raise funds over the last 12 months.

Swiatek, from Poland, said she felt "a real throwback to last year", when this event was taking place as the Russian invasion of Ukraine began.

"This was the first tournament where I had a chance to make a speech when the war started in Ukraine," she said. "I feel like we all have pretty short memories, but we should all support Ukrainians with everything they're coping with every day.

"It's pretty disappointing the situation is not changing, but hopefully they will stay strong."

Iga Swiatek and Jessica Pegula will clash in a WTA Tour final for the first time after taking wildly contrasting routes through to the Qatar Open title match.

While Pegula was taken to three sets by Maria Sakkari on Friday, world number one and defending champion Swiatek required only 56 minutes to score a 6-0 6-1 drubbing of Veronika Kudermetova.

In windy conditions in Doha, the top two seeds set up a Saturday showdown that will have plenty riding on it in terms of their rivalry.

When Swiatek lost to Pegula in early January at the United Cup in Sydney, winning only four games, the Pole was left in tears.

The rematch will either see Swiatek reassert her dominance over Pegula, or see the American show she has the 21-year-old's number for now.

Swiatek won all four matches she played against Pegula last season, with French Open and US Open quarter-finals victories among that set, but their last match has put a fresh spin on the head-to-head.

Crushing Kudermetova showed Swiatek at her ruthless best, and the world number one said: "I feel great. I was pretty worried how I was going to cope with the conditions today so I'm glad I played a smart way and I'm pretty happy I was so solid."

She is relishing the chance to test herself against Pegula again, saying: "It always takes a lot to win against Jessie. She's a great player, a really solid one, and we'll see, honestly. I'm not going to predict anything or over-analyse, I'll just play my best tennis."

Pegula overcame Greek fifth seed Sakkari 6-2 4-6 6-1 in the first semi-final.

While Swiatek will be chasing a 12th WTA-level singles title, the 28-year-old Pegula is after a third such trophy.

Speaking of the Sakkari match, Pegula said: "That was probably the hardest conditions I've ever had to play in, wind-wise. I played very smart."

Iga Swiatek will play Veronika Kudermetova in the Qatar Open semi-finals after the Russian defeated Coco Gauff in the last eight.

World number one Swiatek was already assured of her semi-final place heading into Thursday as Belinda Bencic's withdrawal had granted her a walkover.

She could watch on then as Kudermetova upset fourth seed Gauff 6-3 3-6 6-1 in Doha.

Swiatek has won each of her previous two matches against Kudermetova in straight sets, but the world number 11 will be on a high after her first top-10 win of the season.

It will be the 25-year-old's second semi of the season, although she withdrew from her Adelaide 2 match-up against Bencic.

While Gauff is out, there remains American representation as her doubles partner Jessica Pegula made light work of Beatriz Haddad Maia 6-3 6-2.

Pegula, the second seed, will face Greece's Maria Sakkari, who overcame third favourite Carolina Garcia 6-2 6-7 (5-7) 7-6 (7-5) in a battling encounter.

Iga Swiatek started the defence of her Qatar Open title by taking less than an hour to beat Danielle Collins on Wednesday.

Playing for the first time since she was knocked out of the Australian Open by Elena Rybakina in the fourth round last month, normal service was resumed by the domineering world number one in Doha.

The top seed brushed Collins aside in only 53 minutes, racing to a 6-0 6-1 victory to march into the third round.

Collins only won four points as she suffered the misery of a first-set bagel, an inspired Swiatek taking the opener in only 21 minutes.

Swiatek's run of games won was ended at nine when Collins got on the board at 3-1, but the Pole broke for a fifth time before serving it out for an emphatic victory.

The 21-year-old three-time grand slam champion, who made only six unforced errors, will do battle with Belinda Bencic for a place in the quarter-finals.

Bencic beat two-time champion Victoria Azarenka 1-6 7-6 (7-4) 6-4 to take her place in the last 16, storming back from 4-1 down in the second set when she appeared to be on her way out.

Second seed Jessica Pegula saved two match puts as she dug deep to beat Jelena Ostapenko 6-2 2-6 7-5 to set up a meeting with Beatriz Haddad Maia, who beat Daria Kasatkina in straight sets.

Fourth seed Coco Gauff got the better of Petra Kvitova 6-3 7-6 (8-6), while Veronika Kudermetova and Maria Sakkari also made it through.

Elena Rybakina believes she can become the best player in the world if she performs as she did in the first week of the Australian Open after beating Iga Swiatek.

Wimbledon champion Rybakina claimed the scalp of the top seed on Sunday, winning 6-4 6-4 on Rod Laver Arena to reach the quarter-finals.

Swiatek was in a class of her own last year, winning eight titles – including the French Open and the US Open – to firmly establish herself as the best player in the world.

The Pole was the favourite to win the Australian Open for the first time, but the 25-ranked Rybakina sent her packing to set up a showdown with Jelena Ostapenko.

Rybakina made history with her fourth-round win, becoming the first woman representing Kazakhstan to reach the quarter-finals of the Australian Open.

The 23-year-old knows she has plenty to work on, but feels she can rise to the top of the rankings if she continues to improve and consistently match the high standards she has set at Melbourne Park.

Asked if she can be the best in the world when she's at her best: "Every opponent is really tough, and for sure for me I think there are still many things to improve.

"If I perform like I did this week and consistently, I will say that I can be number one, I can beat anyone. For now, I need to find my consistency."

Rybakina felt she was rewarded for taking such a positive approach against Swiatek.

"For sure when you play against the number one player, I think you have really nothing to lose. I knew that I had to be aggressive from the first ball because she's a great mover, and she defends really well.

"So I was trying to just attack her from the first ball, and it really worked well."

Top seed Iga Swiatek says the pressure of not wanting to lose at the Australian Open got to her and believes she needs a change of mindset after her fourth-round loss to Elena Rybakina.

The three-time grand slam champion had come into the Australian Open as the title favourite but was bundled out by 2022 Wimbledon champion Rybakina 6-4 6-4 in one hour and 30 minutes on Sunday.

The Kazakh's power was too much for Swiatek, with Rybakina outstanding on serve, leading to apparent frustration from the world number one as the match slipped away.

"I felt the pressure, and I felt that I don't want to lose instead of I want to win," Swiatek told reporters. "So that's a base of what I should focus on in next couple of weeks.

"It was just tough. But for sure I need to work on my kind of mindset and fight a little bit more as I did last season.

"So, for sure I'm going to take time right now to kind of reset."

Swiatek won both the US Open and French Open titles in 2022, while she went on a 37-match winning streak that ended during Wimbledon.

The 21-year-old Pole denied that the pressure of being the world number one played a part in her exit.

"I don't think that matters," she said. "I experience it differently because I felt differently.

"But I was number one on Roland Garros, I was number one on Wimbledon, and US Open. I was able to - maybe not on Wimbledon - but I was able to play well and compete. I don't think that matters."

Swiatek was able to bounce back from her third-round Wimbledon loss to Alize Cornet quickly by triumphing at Flushing Meadows only two months later but she would not draw an parallels with Sunday's defeat.

"I don't see that many similarities, honestly," Swiatek said. "I feel like it's pretty easy. I just wasted too much energy before the tournament and during the first days of the tournament to worry.

"It's just different period of time for me. Before the US Open I was actually able to kind of let it go because I played pretty bad in Toronto and Cincinnati, and that helped me kind of to reset and just start the US Open without actually expecting much from myself.

"Here was different, so I'm not connecting the US Open with the streak at all. I'm not comparing this situation to my Wimbledon loss."

Swiatek praised Rybakina, who will face Jelena Ostapenko in the quarter-finals, for her play on Sunday, stating she was tactically composed and focused.

World number one Iga Swiatek was knocked out of the Australian Open in straight sets in the fourth round by Wimbledon champion Elena Rybakina on Sunday.

The reigning US Open and French Open winner could not handle Rybakina's outstanding serve, with the Kazakh triumphing 6-4 6-4 in one hour and 30 minutes on Rod Laver Arena.

Rybakina won 80 per cent of first-serve points, including sending down six aces, while she broke Swiatek four times throughout the match.

Swiatek's elimination means the top-two seeds in both the women's and men's singles are out, with Ons Jabeur losing in the second round.

Title favourite Swiatek had routed Cristina Bucsa in 55 minutes in Friday's third-round win but she was broken immediately on Sunday by 23-year-old Rykabina, who offered a different threat.

"It was a really tough match," Rybakina said during her on-court interview after the match. "I really respect Iga. Today I think I was serving so good. In the end, I think in the important moments I played really well. I think that was the difference."

Swiatek did respond after Rybakina's early break by squaring up the first set at 2-2, but the Kazakh re-claimed her lead for 4-3, before serving to love to clinch the opening frame.

The 21-year-old Pole seemed outclassed in the 42-minute first set, but responded immediately in the second, racing to a 3-0 lead, only for Rybakina to hit back again to get it back on serve.

Rybakina failed to convert two break points at 15-40 in the ninth game but capitalised on her third opportunity, before serving out for victory, including another big ace at 30-0.

Data slam: Swiatek's grand slam dominance halted

Swiatek had not dropped a set all tournament, prior to losing the opening frame to Rybakina. In fact, the Pole had lost only two sets in her past 10 grand slam matches, dating back to her 2022 US Open triumph. Including her 2022 French Open title, she had only dropped five sets in her previous 19 grand slam matches.

WINNERS/UNFORCED ERRORS

Swiatek – 15/14
Rybakina – 24/25

ACES/DOUBLE FAULTS

Swiatek – 2/1
Rybakina – 6/1

BREAK POINTS WON

Swiatek – 2/4
Rybakina – 4/6

Magda Linette made it through to the fourth round of a grand slam for the first time after she beat Ekaterina Alexandrova 6-3 6-4 at the Australian Open.

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.

Iga Swiatek is growing in confidence by the day after she blew Cristina Bucsa to reach the fourth round of the Australian Open.

The world number one ruthlessly dispatched the Spanish qualifier 6-0 6-1 in just 55 minutes on Margaret Court Arena on Friday.

Swiatek won the French Open for a second time last year before claiming her first US Open title and the 21-year-old is the favourite to be crowned champion at Melbourne Park.

Reflecting on her progress through the draw so far, the Pole believes she is making great strides in her quest for a fourth grand slam triumph.

"I feel I'm more and more confident since day one here," she said. "I feel like I've done so much work to feel more confident, more relaxed on court.

"I'm pretty happy I did it because it's just a little bit easier. Whe you actually play those matches, you can feel the rhythm a little bit more.

"I don't feel like the tournament is going to start now, because first rounds are always challenging.

"I'm trying to treat every match separately. I always try to have the same mindset. I can just say that I feel more confident because I'm played a couple of matches here."

Swiatek will do battle with Elena Rybakina in the fourth round and will ensure she does her homework before facing the Wimbledon champion.

"Tactically, I'm not prepared yet. We played an exhibition in Dubai, [but] it's hard kind of to take a lot from that match," she said.

"I'm pretty sure my coach is going to be ready to give me some tips. We'll see [but] I'm not really thinking about that today."

World number one Iga Swiatek made an emphatic statement with a 54-minute rout of Spanish qualifier Cristina Bucsa to seal her progression to the Australian Open fourth round on Friday.

Swiatek dropped only six points in a 22-minute first set, before completing a 6-0 6-1 demolition over her 25-year-old opponent at Margaret Court Arena.

The Pole led 6-0 5-0, prompting a crowd member to shout "open the bakery", before Bucsa held her serve to avoid a dreaded double bagel.

Swiatek's victory sets up a fourth-round clash with 2022 Wimbledon champion Elena Rybakina, as the Pole chases her fourth major triumph, including the French Open and US Open crowns last year.

The 21-year-old completely outclassed her opponent, winning 82 per cent of serve points, along with 65 per cent on return, including 71 per cent on Bucsa's second serve. The Spaniard only won 19 of 71 points for the match.

Despite an unconvincing first-serve percentage of 59 per cent, Swiatek never offered up a break point, hitting 15 winners throughout the lopsided contest.

Swiatek has not dropped a set in her three matches at the tournament, giving up only six games in her past two matches.

Data slam: Swiatek demolition falls short of Barty mark

Swiatek's swift victory coincidentally came on the afternoon after Andy Murray and Thanasi Kokkinakis battled until 4am local time in a five-hour-and-50-minute epic in the men's singles.

However, the Pole's 54-minute win was not as brief as last year's champion Ash Barty who disposed of Danka Kovinic 6-0 6-0 in 44 minutes at the 2021 Australian Open.

WINNERS/UNFORCED ERRORS

Swiatek – 15/6
Bucsa – 4/21

ACES/DOUBLE FAULTS

Swiatek – 3/0
Bucsa – 1/3

BREAK POINTS WON

Swiatek – 5/10
Bucsa – 0/0

World number one and tournament favourite Iga Swiatek feels second-round opponent Camila Osorio did not do much wrong despite going down 6-2 6-3 on Wednesday.

Swiatek is seeking her fourth career grand slam singles title, and the 21-year-old is yet to drop a set through two rounds at the Australian Open.

She was nearly flawless in her service game against Osorio, landing 80 per cent of her first serves fair while also committing zero double faults, and she was just as impressive when on the return.

Osorio was able to win just 31 per cent of her service points in the opening set (eight-of-26), and for the match she only held serve on two occasions from eight attempts.

Despite Swiatek's clear advantage in both phases, Osorio managed to break her serve three times, and the Polish superstar said she was made to earn every point.

"It was much tougher than this score says – it was really intense physically and Camila was really running to every ball," she said. "She didn’t give up. She didn’t give me many points for free. 

"So I needed to really work for each of them and it was tough, but I’m happy that I was proactive and trying to just play a little bit to put pressure [on her]. I’m pretty happy that I won and I can play next round."

Swiatek also shared a story about when the rain started pouring on Tuesday night in the midst of her walk, urging spectators in jest to come to her aid if a similar situation arises in the future.

"In Melbourne it’s usually sunny, except today and yesterday," she said. "So I need to change my plans. 

"Yesterday I actually went for a walk at 7[pm] and it started raining, and I was just hiding under the tree, waiting for like 30 minutes.

"So if there’s anybody who’s going to see me tonight walking in the rain, please save me, give me an umbrella or something."

Swiatek's march to what would be her first Australian Open final continues when she takes on the winner between Cristina Bucsa and Bianca Andreescu in the third round.