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.

Belinda Bencic stood firm to reach the quarter-finals of the Abu Dhabi Open while fellow favourites Anett Kontaveit and Jelena Ostapenko headed home.

Bencic clinched her second last-eight spot of the year with a 6-4 7-5 win over Marta Kostyuk, though the world number nine was pushed hard by the Ukrainian, who remains without a top-10 win in her career after failing to see through the second set from 5-3 up.

The second seed will next face Shelby Rogers, who advanced courtesy of a walkover following Kontaveit's retirement through injury after falling 4-1 behind in the pair's decisive third set. 

Kontaveit was not the only seed to fall, with Ostapenko slipping to a surprise 7-6 (12-10) 6-1 loss against China's Zheng Qinwen.

Fourth seed Veronika Kudermetova fared better, however, racing to a 6-1 7-5 win against Elise Mertens to keep her campaign alive. 

At the Linz Open, top seed Maria Sakkari cruised to a straight-sets success against Varvara Gracheva, while Anastasia Potapova battled to a 7-5 3-6 6-3 victory against Jule Niemeier.

Third seed Irina-Camelia Begu was the highest-ranked player to exit in the last 16 in Austria, suffering a 6-2 6-1 defeat against Danish 20-year-old Clara Tauson.

Number five seed Jelena Ostapenko booked a place in the last 16 of the Abu Dhabi Open with victory over Danielle Collins in three sets on Monday.

Ostapenko, looking to add to the fifth career title she won in Dubai 12 months ago, edged an entertaining contest 7-5 1-6 7-5 in two hours and 19 minutes.

Fellow seeded player Anett Kontaveit was also victorious on the opening day of the tournament, but only after battling back to beat Zhang Shuai 4-6 7-6 (7-4) 6-4.

Marta Kostyuk saw off Sorana Cirstea 6-2 1-6 6-2, meanwhile, and will now face second seed Belinda Bencic in the next round.

Elise Mertens is also through to round two, where Veronika Kudermetova awaits, after dominating Martina Trevisan 6-0 6-2.

In the first main draw match at the Linz Open, Sofia Kenin let an early lead slip to lose 2-6 6-3 6-4 to Jule Niemeier.

Jelena Ostapenko was once again left bemoaning the electronic line calling system in place at the Australian Open after her quarter-final defeat to Elena Rybakina.

The Latvian did not blame the system for her loss, with Rybakina sealing a convincing 6-2 6-4 victory on Tuesday, but reiterated her belief that calls are being missed.

When asked following her fourth-round win against Coco Gauff whether she believed in the system, Ostapenko replied with a smile: "Honestly? No."

Speaking after her loss to Rybakina, she again smiled as she said: "I'm not really happy with the system they are using.

"A couple of times it was not even by a couple of centimetres. It was much more than that. But I cannot do anything about it, because it is the way as it is.

"First of all, [the calls] are really late sometimes. You already hit the ball, and then you hear 'out,' which is normally not the way it is with the line umpires. And second of all, some balls were quite, how you say, not a little out. They were [quite] a bit out and they were not called."

The number 17 seed – who suffered her first defeat in nine WTA-level quarter-finals – called for a return of the Hawk-Eye system and line judges, which was replaced at the Australian Open by the electronic system in 2021.

"Honestly, my personal opinion, I wish it would be the Hawk-Eye system and the line umpires, because I feel like that way it's more precise, and much [fewer] mistakes, in my opinion," the 2017 French Open champion added.

"... I think also, that way it looks a little better for me on the court how it is. Not just calling-wise, but in general how the court looks, because with no line umpires, for me, it looks a little empty."

Ostapenko was under no illusion that her own performance had not been at the level it was when she beat Gauff, and suggested that her participation in the mixed doubles late on Monday was a factor.

"I think in general today the level of the match was I think much lower than the previous one," she said. "I felt like me and Coco, we had a really high level of tennis and we played really well. It's a little shame that I couldn't bring this level of the tennis today.

"Obviously [Rybakina] was serving well, but I felt like already in the second set when I had the longer rallies with her, I was winning mostly, so that was my goal to make her play.

"I felt like maybe mixed doubles yesterday was a little bit not the right decision to play that late. But in general I think I can take only positive things out of this week, because it's only the beginning of the season, and if I keep working and keep playing the same way, I think I can be dangerous player."

Elena Rybakina's Wimbledon success last year is helping her to progress at the Australian Open.

The number 22 seed reached the semi-finals after a convincing 6-2 6-4 victory against Jelena Ostapenko on Tuesday.

Fresh from beating world number one Iga Swiatek in the fourth round, the only thing that slowed Rybakina down against the 17th seed was a 20-minute rain delay in the first set.

She got through her quarter-final in just an hour and 19 minutes of play, and pointed to her experience at Wimbledon, which culminated in her maiden grand slam win.

"Of course I got all the experience at Wimbledon, and it's helping me now this time here in Australia and I know what to expect," she said.

"For sure it's just easier in this case after Wimbledon. [I am] feeling good on the court and just really enjoying every match I'm playing here."

Rybakina's serve was a key weapon again, hitting 11 aces and winning 76 per cent (29 of 38) of points on her first serve.

She now has a total of 29 aces in the tournament, the most by a women's player and more than her previous three Australian Open campaigns combined.

"[It is] tough to say for me, because I think compared to other girls, I'm quite tall," she said when asked if hitting aces are an under-used part of women's tennis. "I mean, there [are] other girls which are also strong and tall, but for sure I think it's not only about the height.

"I'm happy with my serve. I guess everybody else needs to think if, in this aspect, they need to work more or not, because some girls, they are fine maybe not with the speed, but they have good angles on the serve. They are opening the court. I think everybody is different, and everybody just trying to do what's best for them on the court."

The 23-year-old will face either Jessica Pegula or Victoria Azarenka in the final four, and is excited by once again being included in the business end of a grand slam.

"Of course in the beginning of the tournament, it feels like, 'Oh, it's such a long tournament'," she said. "Now it seems already close. I'm trying to focus just on one match.

"For sure it's close, that's why everybody I think is now going to try even harder, fight for every ball. It's only good players left. For sure it's going to be tough matches."

Elena Rybakina is through to the semi-final of the Australian Open after a convincing 6-2 6-4 victory against Jelena Ostapenko on Tuesday.

Rybakina, 25, became the first man or woman from Kazakhstan to win a grand slam when she lifted the Wimbledon trophy in 2022, and she is now two matches away from securing her second.

Against Latvia's Ostapenko, Rybakina had a clear power advantage, illustrated by her 11 aces while conceding only one.

She secured a break in the first game of the match, and quickly grabbed a second to race through the first set in 33 minutes. 

It was Ostapenko who snagged the early break in the second set, but she was unable to consolidate it, failing to hold serve in each of her next two chances to allow Rybakina to claw back in front.

Ostapenko will rue some wasteful play as she finished with more break point opportunities than her victorious opponent, but was only able to convert one of her eight chances.

Rybakina will meet the winner between Jessica Pegula and Victoria Azarenka in the semi-final.

Data Slam: Rybakina adds a new string to her bow

With 29 aces so far, Rybakina leads all women at this year's Australian Open in the category. That figure is a testament to her overall serving improvement, as well as what is now her deepest run down under, with more aces this tournament than her past three Australian Open campaigns combined.

ACES/DOUBLE FAULTS

Rybakina – 11/3

Ostapenko – 1/1

WINNERS/UNFORCED ERRORS

Rybakina – 24/21

Ostapenko – 19/22

BREAK POINTS WON

Rybakina – 4/6

Ostapenko – 1/8

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."

Coco Gauff revealed her frustration after her unbeaten start to 2013 was ended as the seventh seed bowed out of the Australian Open to Jelena Ostapenko in the fourth round on Sunday.

The 18-year-old American came into the Melbourne event fresh from victory at the Auckland Open but had not dropped a set in her three Australian Open victories, including toppling Emma Raducanu in the second round.

Gauff enjoyed a strong 2022 season that included reaching the US Open quarter-finals and finishing runner-up at the French Open.

But on Sunday, 2017 French Open champion Ostapenko triumphed 7-5 6-3 in one hour and 34 minutes, ending Gauff's Australian Open campaign, leaving the teenager in tears as she explained her frustration.

"I felt really good coming into the tournament, and I still feel good," Gauff told reporters. "I still feel like I've improved a lot but when you play a player like her and she plays really well, you know there's nothing you can do.

"I feel like today I would say nothing because every match you play a part in, but I feel like it was rough, so it's a little bit frustrating on that part."

Ostapenko hit 30 winners compared to Gauff's 21, while the Latvian did commit more unforced errors (27-14).

Gauff generated eight break points throughout the match but only took one, while Ostapenko took all three of hers.

"Today I learned a lot," Gauff said. "A little bit frustrated, but I think I'll rewatch and see where I went wrong and if I did go wrong.

"I feel like from the feedback I've gotten that she just played really well today. She stepped up her game when she needed to, and she held and broke me when she needed to, and I didn't do that."

Ostapenko progresses to the quarter-finals where she will take on 2022 Wimbledon champion Elena Rybakina who knocked off top seed Iga Swiatek.

Emma Raducanu and Coco Gauff both got off to winning starts at the ASB Classic in Auckland on Tuesday.

Raducanu had to come from a set down to beat Linda Fruhvirtova 4-6 6-4 6-2, while top seed Gauff had an easier time of it as she dismissed Tatjana Maria 6-4 6-1 on another day interrupted by the rain.

Second seed Sloane Stephens was only able to get through three games before play was suspended in her match against Rebeka Masarova, while fifth seed Wang Xiyu was 5-3 down in the first set against Karolina Muchova when the rain came.

Fourth seed Bernarda Pera is out after her match with Viktoria Kuzmova resumed having being washed out on Monday, and the American was unable to prevent a 6-4 6-4 defeat, with Kuzmova advancing to face Raducanu in the last 16.

The only two other matches completed on Tuesday saw Elena-Gabriela Ruse beat Erin Routliffe in three sets, and Anna Blinkova overcome Elisabetta Cocciaretto, also in three.

At the Adelaide International, Zheng Qinwen earned a hard-fought victory against number six seed Anett Kontaveit, eventually winning 6-1 4-6 7-6 (9-7).

Eighth seed Ekaterina Alexandrova also crashed out despite winning the first set against Marketa Vondrousova, going on to lose 4-6 6-3 6-2, though seventh seed Jelena Ostapenko is through after beating Karolina Pliskova 6-1 6-3.

In a contest that lasted over two-and-a-half hours despite only two sets being played, Victoria Azarenka beat Anhelina Kalinina 7-6 (11-9) 7-6 (7-5), and will face Zheng next, while Sorana Cirstea will go up against top seed Ons Jabeur in the last 16 after beating Viktorija Golubic in straight sets.

American teenager Coco Gauff showed why she deserves to be at this year's WTA Finals with a commanding 6-0 6-3 victory over Martina Trevisan at the Guadalajara Open.

The fifth seed clinched her maiden spot at the season-ending WTA Finals on Wednesday and backed that up by securing her third WTA 1000 quarter-final on Thursday.

Gauff reeled off the first nine games of the match against Trevisan, where she triumphed in one hour and one minute. The 18-year-old came under pressure from Trevisan, who generated nine break points for the match but Gauff saved all bar one of them.

World number one Iga Swiatek (47) is the only player to have won more matches this year in straight sets than Gauff (32).

Gauff will face Victoria Azarenka in the quarter-finals after the Belarusian toppled 13th seed Madison Keys 6-4 6-7 (4-7) 6-1 in two hours and 13 minutes.

Two-time Australian Open winner Azarenka swept aside Keys in 32 minutes in the third set after a titanic battle in the opening two frames, winning 26 of the 37 final-set points. Azarenka's quarter-final appearance is her 34th since 2009, with only four players having more during the span; Agnieszka Radwanska (42), Simona Halep (39) and Caroline Wozniacki (36).

Third seed Jessica Pegula advanced to the last eight with a 6-4 6-4 victory over former US Open champion Bianca Andreescu. 

The American, who survived three match points against Elena Rybakina on Wednesday, trailed early against the Canadian but took control of the match. Pegula will face Sloane Stephens in the quarter-finals after she toppled 2022 US Open semi-finalist Caroline Garcia 7-6 (8-6) 7-5.

On the day her WTA Finals berth was confirmed, seventh seed Daria Kasatkina lost 6-2 2-6 6-3 to Anna Kalinskaya in two hours and 14 minutes.

Fourth seed Maria Sakkari fought back to win 5-7 6-3 6-3 over 14th seed Danielle Collins, while Marie Bouzkova copped a bagel before triumphing 0-6 7-5 6-3 over Liudmila Samsonova.

Sakkari will next meet eighth seed Veronika Kudermetova who beat Jelena Ostapenko 6-4 6-4. Bouzkova will take on Kalinskaya in the last eight.

It was a great day for the highly ranked Americans at the Guadalajara Open on Wednesday, headlined by world number five Jessica Pegula and her 2-6 6-3 7-6 (10-8) comeback win over Wimbledon champion Elena Rybakina.

Pegula, who is now locked into the top-eight and therefore will qualify for the WTA Finals, struggled to win points on her serve in the opening set, but raised her 57 per cent success rate up to 69 per cent in the second set, and 66 per cent in the decider.

The American had to come from a break down in the second set to keep her tournament alive, and she will now face Canada's Bianca Andreescu in the third round.

Meanwhile, fellow United States star Coco Gauff was too good for Italy's Elisabetta Cocciaretto, winning 7-6 (7-1) 6-3 to book a third-round clash with another Italian, Martina Trevisan, who earned her way there with a 6-0 4-6 6-3 win over Katerina Siniakova.

The other two seeded Americans were also successful, with 13th seed Madison Keys coming from a set down to defeat Ajla Tomljanovic 3-6 6-4 6-3, and 14th seed Danielle Collins repelled the challenge of Magdalena Frech 6-3 6-4.

There were positive signs for former world number five Eugenie Bouchard, who ended up losing, but showed she still has her talent by taking a set off world number 23 Jelena Ostapenko in a 7-5 2-6 6-1 result.

Russian pair Anna Kalinskaya and Liudmila Samsonova both emerged in three-set outings, with Kalinskaya outlasting Elise Mertens 6-4 0-6 7-5, while Samsonova upset world number four Aryna Sabalenka 6-4 2-6 6-2.

World number 12 Veronika Kudermetova kept her WTA Finals hopes alive with a 6-4 7-5 win over Donna Vekic, and the Czech Republic's Marie Bouzkova ousted Colombia's Camila Osorio 6-3 6-1.

In the late window, Sloane Stephens eliminated Olympic gold medalist Belinda Bencic 6-4 6-4, and top overall seed Paula Badosa retired due to injury after losing the first set 6-2 against Victoria Azarenka.

Belinda Bencic fought back to defeat Eugenie Bouchard in an Ostrava Open first-round contest that took over two and a half hours to settle.

Bouchard took the first set, but Bencic came from behind to advance with a 6-7 (7-9) 6-1 6-4 victory on Tuesday.

Eighth seed Jelena Ostapenko, runner-up in the Korea Open, suffered a premature exit as Aliaksandra Sasnovich consigned the former French Open champion to a 6-2 6-2 defeat.

Emma Raducanu also went out in straight sets, with Daria Kasatkina beating the 2021 US Open champion 7-5 6-4.

Catherine McNally blitzed to a 6-1 6-2 victory over Anna Blinkova, while Alycia Parks progressed past Karolina Pliskova to secure the first top-20 win of her career.

Top seed Ons Jabeur swept aside Ann Li with relative ease in a 6-2 6-3 victory at the Jasmin Open to reach the last 16.

Veronika Kudermetova, the second seed, breezed past Varvara Gracheva with a commanding 6-1 6-0 win.

Anastasia Potapova, Petra Martic, Magdalena Frech and Harriet Dart were among the other victors.

Korea Open finalist Jelena Ostapenko was knocked out in the first round of the Tallinn Open after letting a one-set lead slip against Kaia Kanepi.

Ostapenko looked to be cruising after winning the opener, but Kanepi levelled in the second despite the Estonian watching five set points come and go.

Kanepi then romped to victory with a stunning final set to defeat Ostapenko 4-6 6-4 6-0 and keep her hopes of winning her home tournament alive.

In second-round action, Beatriz Haddad Maia is through to the quarter-finals after a 6-1 7-5 success over Linda Noskova.

After Haddad Maia cruised to a one-set lead, the second was a much tighter affair before the Brazilian's class showed as she broke Noskova and then held serve to earn a straight-sets win.

Second seed Belinda Bencic also secured her place in the final eight with a 6-4 6-7 (2-7) 6-3 triumph over Katie Boulter.

At the Parma Ladies Open, top seed Maria Sakkari came from behind to beat Arantxa Rus and seal her quarter-final spot.

Rus saved five out of five break points as she won the opening set 6-3 to give her hope of an upset.

Those hopes were soon dashed though as world number seven Sakkari broke twice to take the second set 6-2, before clinching the match in the third to tee up a clash with Maryna Zanevska.

World number 33 Irina-Camelia Begu made it 12 consecutive wins on clay by overcoming Matilde Paoletti in straight sets and will face fellow Romanian Ana Bogdan in the next round after she beat Anna Karolina Schmiedlova 6-2 3-6 6-3.

Fourth seed Sloane Stephens saw her tournament come to an end after she was defeated by Danka Kovinic.

Ekaterina Alexandrova is aiming high after overcoming some early nerves to beat top seed Jelena Ostapenko in the Korea Open final for her third WTA Tour title.

The 27-year-old prevailed 7-6 (7-4) 6-0 in Seoul to add to previous titles won in Shenzhen and 's-Hertogenbosch, the latter coming just three months ago.

Alexandrova is at a career-high 24th in the WTA rankings and is hoping to climb further before the year is out.

"You always want to achieve more. I want to go higher and maybe end the year in the top 20 in the best-case scenario," she said in her on-court interview.

Ostapenko advanced to Sunday's final after Emma Raducanu retired injured in the previous round and was aiming to become the first two-time champion in the event.

Second seed Alexandrova dug deep in the first set by recovering from a break down three times against the 2017 winner before saving a set point at 6-5 down.

The Russian looked far stronger in the second set as she posted her sixth bagel of 2022 to seal victory in a time of 85 minutes.

"I think it was tough for me to start because I was really nervous and I couldn't find my rhythm in the first couple of games," Alexandrova said.

"But the longer we played, the better I felt on the court. I think maybe somewhere in the end of the first set I finally found the rhythm and I just continued to keep it that way."

Emma Raducanu was forced to retire from her Korea Open semi-final against Jelena Ostapenko due to injury, leaving the Latvian to face second seed Ekaterina Alexandrova in Sunday's final.

The 2021 US Open winner was featuring in her first semi-final since that fairytale triumph at Flushing Meadows, and took the opening set 6-4 after making a flying start on Saturday.

Ostapenko then fought back to level the match, with Raducanu first appearing to struggle with her movement when she was a break up in the second, forcing her to take an off-court medical timeout.

The 19-year old later retired citing a left glute injury when 3-0 down in the decider, ending her confidence-boosting run in Seoul and teeing up a final meeting between the top two seeds.

Indeed, Alexandrova enjoyed a more routine outing in her meeting with Wimbledon semi-finalist Tatjana Maria, downing the German 6-2 6-4 to advance to her second final of the year.

At the Pan Pacific Open in Tokyo, meanwhile, Chinese teenager Zheng Qinwen reached her first WTA Tour final with a hard-fought win over world number 13 Veronika Kudermetova.

Having required over three hours to seal her 5-7 6-3 7-6 (7-3) triumph, the world number 36 said: "After the match when I won the last point, the feeling was incredible. 

"The opponent, she's playing unbelievable tennis. She has a really good serve and hits the ball hard, she moves well. It's my first time in the final. I'm so happy."

Her compatriot Zhang Shuai was unable to replicate those exploits, however, as Liudmila Samsonova eased into her third WTA final of the year with a 7-6 (7-4) 6-2 win. 

In-form Samsonova has won both of her previous final appearances this year - each of which came last month - and is 3-0 in showpiece matches for her career.