Angelique Kerber was the only player to book her place in the Pan Pacific Open semi-finals on Friday as rain washed out three other matches.

Kerber was in action against Madison Keys and advanced courtesy of the American's retirement in Osaka.

Keys had pegged the German back by winning the second set but then succumbed to injury having been broken at the start of the third, down 6-4 4-6 2-1 when she called time.

Kerber said: "It was a really good match in the first two sets and this is never the way that you want to win the match.

"I hope Madison will recover really soon so she is ready for the next tournaments.

"I tried to give everything I could today and I'm looking forward to playing the next round."

However, the three-time grand slam champion was still waiting to learn the identity of her last-four opponent after the weather intervened.

Anastasia Pavlyuchenkova broke for a 2-0 lead over Misaki Doi in the opener before the rain started to fall, suspending the match for several hours before it was put back to Saturday.

Hometown hero Naomi Osaka, the former world number one, did not get on the court at all against Yulia Putintseva. Elise Mertens was also made to wait to take on Camila Giorgi.

Serena Williams suffered an injury scare as she progressed to the last eight of the US Open with a straight-sets win over Petra Martic.

Though she was broken early in the match, Williams never really looked troubled by Martic as she won her 99th match at the US Open.

That tally is her most at a grand slam, but the 23-time major winner's triumph was not without drama as she rolled her ankle in the second set when going to the net.

Williams had to take a medical timeout but said she felt "good" afterwards, and her spirits will likely have been boosted by the exits of Ashleigh Barty and Karolina Pliskova.

BARTY PUTS IT IN PERSPECTIVE

Barty was stunned by Wang Qiang in her fourth-round clash, the second seed making 39 unforced errors in a highly disappointing display.

Wang claimed a 6-2 6-4 win, denying Barty the chance to play Williams in the quarter-finals, but the French Open champion was able to look back on her grand slam season with satisfaction.

"We've had a great season in grand slams for singles. We've made the second week every single one, which has been really special," Barty told a media conference.

"Now we'll sit back, reflect, and look forward to a big couple months to finish off the year."

DOUBLE CELEBRATION FOR SVITOLINA

Elina Svitolina, meanwhile, saw off American Madison Keys in straight sets.

Svitolina is in a relationship with Gael Monfils, who watched on in Arthur Ashe Stadium.

Monfils turned 33 on Sunday, and Svitolina revealed she was inspired by playing on his birthday.

"It's his birthday, I was trying to be really focused on my match but it was extra motivation for me," Svitolina told ESPN on court afterwards.

 

LAST EIGHT IS GREAT FOR KONTA

Johanna Konta outlasted third seed Pliskova in an engrossing match on Louis Armstrong, producing a fine comeback to prevail 6-7 (1-7) 6-3 7-5.

It means the Briton has now reached the last eight of every slam in her career.

Konta is also the first British woman to reach this stage at the US Open since Jo Durie in 1983.

"I'm really pleased [with that achievement]," Konta said at a media conference. 

"I think for me more on a personal level to be able to have made it to the quarters for my third slam in a row, I think that's a really, really big achievement for me. So I'm really pleased with that."

Karolina Pliskova survived a scare to keep her US Open hopes alive, while Serena Williams cruised into the fourth round at Flushing Meadows.

Having seen Simona Halep stunningly undone by qualifier Taylor Townsend on Thursday, the fans at Flushing Meadows may have thought another shock was on the cards when Ons Jabeur took Pliskova to a decider.

However, the third seed rallied to reach the last 16, where she will meet Johanna Konta.

Williams enjoyed a more comfortable day at the office in seeing off Karolina Muchova in straight sets and will play Petra Martic after her win over Anastasija Sevastova.

Meanwhile, Madison Keys had her blood pressure taken in her straight-sets win over Sofia Kenin.

 

PLISKOVA NOT SATISFIED

It appeared to be plain sailing for Pliskova when she breezed to the first set 6-1 against world number 62 Jabeur.

However, the Tunisian fought to send the match to a third set, and Pliskova needed over two hours to come through a stern test 6-1 4-6 6-4.

Afterwards, the former world number one made it clear she was not satisfied with her performance.

"You know, just got in trouble maybe more because of me than her," Pliskova said.

"Of course her game is, once you're not feeling great and her game is not super nice to play because she plays kind of everything, I don't even know if she knows what she's playing, and yeah, then was quite difficult.

"In the end, good. It was big fight. Not for sure the best feeling but I won, which is good."

 

KEYS UNLOCKS KENIN

Tenth seed Keys looked set to claim a comfortable win over compatriot Kenin, serving eight aces to take the opening set in 27 minutes.

However, her hopes of returning to the final she reached in 2017 seemed in jeopardy when she had the blood pressure strap on her arm at 3-3 in the second.

Yet she was able to break for a 6-5 lead and withstood pressure from Kenin to serve out a 6-3 7-5 success and set up a fourth-round meeting with Elina Svitolina, who thrashed fellow Ukrainian Dayana Yastremska 6-2 6-0.

"Just not feeling 100 per cent tonight but really glad I was able to get through in two. It would have been a lot trickier if I had to play another set," Keys told ESPN on court afterwards.

KONTA RELISHING PLISKOVA REUNION

When Konta played Pliskova in Rome this year she was on the end of a 6-3 6-4 defeat. However, after thrashing Zhang Shuai 6-2 6-3, the Briton expressed excitement at the chance to avenge that loss.

"I am actually looking forward to seeing how I can do a bit better, how I can just maybe ask some better questions this time around," said Konta.

World number two Ashleigh Barty remains on course for an enticing quarter-final with Williams following her 7-5 6-3 win over Maria Sakkari.

She will next face Wang Qiang, who came back from 3-0 down in the first set to beat Fiona Ferro 7-6 (7-1) 6-3.

Serena Williams moved through at the US Open but sister Venus was sent packing as rain wreaked havoc in New York.

Only five women's singles matches were completed at Flushing Meadows, where poor weather conditions prevented play on uncovered outside courts.

Former world number one and 23-time grand slam champion Serena Williams took to Arthur Ashe Stadium on Wednesday night and survived a scare.

Venus could not make it two from two for the Williams family, while second seed Ashleigh Barty advanced to the third round.

 

SERENA SEES OFF MCNALLY

Six-time US Open champion Serena Williams rallied to beat countrywoman Caty McNally 5-7 6-3 6-1.

Williams dropped the first set against her 17-year-old opponent, but the eighth seed eventually improved to 19-0 in the US Open second round.

The 37-year-old American superstar hit 32 winners and 10 aces, while winning 81 per cent of her first serves.

 

SVITOLINA VANQUISHES VENUS

Elina Svitolina booked her spot in the US Open third round for the fifth successive year after defeating Venus Williams 6-4 6-4.

Svitolina – the fifth seed – needed almost two hours to see off Williams in a second-round blockbuster.

Seven-time grand slam champion and 39-year-old Williams was asked about her future and plans for the remainder of the year.

"I mean, [it] was a great match. It was well-contested and it was great to have the crowd behind me," she told reporters. "It was just a really magical atmosphere.

"I did a lot of things right today. A lot of great things to build on. I missed Asia the last couple of years, so I'd love to head on over and play some more matches."

 

BARTY WINS AS KEYS HITS RIGHT NOTES

French Open winner Barty beat a brave Lauren Davis 6-2 7-6 (7-2) under the Louis Armstrong Stadium lights.

Madison Keys equalled her career-best winning streak by topping Zhu Lin 6-4 6-1 in the second round.

Runner-up in 2017, Keys made it eight consecutive victories after claiming her fifth WTA title at the Western & Southern Open in Cincinnati.

Meanwhile, third seed and 2016 finalist Karolina Pliskova eased past qualifier Mariam Bolkvadze 6-1 6-4.

Williams sisters Serena and Venus barely raised a sweat on day one of the US Open, while Ashleigh Barty dug deep to advance in New York.

Serena and Venus Williams lost three games between them as the American pair cruised through to the second round at Flushing Meadows on Monday.

Former world number one and French Open champion Barty survived a big scare, 2017 US Open runner-up Madison Keys eased into the next round but Angelique Kerber crashed out.

 

SERENA EXTENDS SHARAPOVA DOMINANCE

It was a ruthless performance from 23-time grand slam champion Serena Williams, who demolished Maria Sharapova 6-1 6-1.

Serena – who was at the centre of an infamous meltdown during last year's US Open final – made it 19 straight victories over five-time major winner Sharapova.

Fellow American Caty McNally is up next for Serena after easing past Timea Bacsinszky 6-4 6-1.

Two-time champion Venus Williams, meanwhile, routed Zheng Saisai 6-1 6-0 to extend her first-round record at the tournament to 21-0.

"I was happy with today, so I'm not going to ask for more," said Venus, who faces Elina Svitolina after the fifth seed defeated Whitney Osuigwe 6-1 7-5.

As for 10th seed Keys, she kicked off her campaign with a 7-5 6-0 victory over Misaki Doi after 63 minutes.

 

A MUCH-NEEDED AUSTRALIAN WIN

Australian sport was reeling on Sunday when Ben Stokes and the England cricket team produced a stunning fightback in the third Ashes Test.

And it briefly appeared fans Down Under were set for further pain when Aussie star Barty remarkably fell 5-0 behind to Zarina Diyas in the first set played at Arthur Ashe Stadium in the tournament.

But Barty – a former cricketer – rallied 1-6 6-3 6-2 to provide a much-needed boost, having herself taken in Australia's Headingley aberration.

"[England's performance] was pretty good. Credit where credit's due," she said. "Stokesy was incredible.

"I think we missed some opportunities and my whole team were glued to it. I have an English trainer, as well. He's had a fantastic 24 hours of feeding it to us and not letting us forget that result."

 

ADDED NERVES AMONG CZECH MATES

Karolina Pliskova came through two tie-breaks in an all-Czech clash packed with breaks to beat Tereza Martincova – and the third seed cheekily blamed her opponent's nationality for her nervy display.

"It was not perfect, but I'm through, so that's important," she said. "The first rounds they are always a little bit nervous, I would say, for most of the players.

"It doesn't help that you play somebody from your country, because then it adds some extra nerves, which maybe would not be there if she's from China or something."

Unable to respond as Pliskova did, Kerber was a big opening-day casualty, losing 7-5 0-6 6-4 to Kristina Mladenovic.

Meanwhile, Johanna Konta, who reached the last four at Roland Garros and the last eight at Wimbledon, was made to work for three sets by Daria Kasatkina, having appeared set for swift and stylish progress after taking the opener before prevailing 6-1 4-6 6-2.

Anastasija Sevastova consigned Eugenie Bouchard to a miserable 12th straight singles defeat, a run stretching back to February.

Madison Keys sealed a place in her first hardcourt final since the 2017 US Open with a 7-5 6-4 win over compatriot Sofia Kenin at the Western & Southern Open on Saturday.

Keys hit a superb 41 winners in the all-American clash to book a final showdown with Svetlana Kuznetsova, who produced a dominant performance to see off world number two Ashleigh Barty 6-2 6-4 in Cincinnati.

Kenin saved set point in the opener against Keys before battling back from 5-2 down to 5-5, only for the world number 16 to claim back-to-back games and avert a tiebreak at the WTA Premier event.

Keys was twice a break down in the second set but combined grit with blistering attacking play to down Kenin, avenging a three-set loss in Rome earlier this year.

Kuznetsova is currently down at 153 in the world rankings after periods on the sidelines but has made the most of her wildcard in Cincinnati.

Despite slipping to 2-0 down in the opener, the two-time grand slam champion clicked into gear spectacularly and reeled off eight consecutive games – a forehand return winner on break point to go 5-2 up a particular highlight.

Barty belatedly held for 1-2 in the second to stop the rot but would never another good look at her opponent's serve. Indeed, Kuznetsova avoided giving up break point opportunities in any of her last eight service games.

The result prevented Barty from returning to number one in the WTA rankings after Naomi Osaka was forced to withdraw due to a knee injury in the quarter-finals.

Ashleigh Barty is one win away from returning to the top of the WTA rankings after world number one Naomi Osaka retired in the Western & Southern Open quarter-finals.

Osaka only herself reclaimed top spot by reaching the last eight at the Rogers Cup, but defeat to Sofia Kenin at the same stage in Cincinnati would open the door for Barty.

And the Japanese star, having battled back after losing the first set, taking the second 6-1, was forced to retire at the WTA Premier event on Friday.

Osaka had required treatment to a knee injury and finally retired after being broken early in the third set.

Barty will now unseat Osaka if she advances to the final, having reached the last four with a stunning comeback victory over Maria Sakkari 5-7 6-2 6-0.

Meanwhile, Karolina Pliskova's own hopes of reaching the summit – a possibility if Barty also fell by the wayside – ended as she crashed out to Svetlana Kuznetsova in another three-set contest.

 

BARTY FOCUSED ON TOURNAMENT SUCCESS

The ranking might be on the line for Barty, but she is happy to set that aside and focus on going as far as possible in Cincinnati.

"I'm just keeping my eye on the ball and, if I win matches, the ranking will take care of itself," she said after her win.

"We're excited to be in new territory here in Cincy."

Kuznetsova awaits the Australian and French Open champion.

 

OSAKA WORRIED AFTER BOWING OUT

It was not a good day for reigning US Open champion Osaka.

Osaka retired with a leg injury against Kenin, handing Barty the chance to return to the WTA summit.

It also means Osaka is under an injury cloud ahead of the US Open at Flushing Meadows, where she stunned Serena Williams last year.

"It sucks, especially since I didn't want to get injured this close to the Open," Osaka said. "And now I'm kind of worried a little bit.

"She was playing well. I had to really think about what I had to do during the match, so I'm not that mad at the result. The injured part sucks, but losing, it's not that big of a deal."

 

KUZNETSOVA WINS THRILLER AGAINST PLISKOVA

Two-time grand slam champion Kuznetsova outlasted third seed Pliskova 3-6 7-6 (7-2) 6-3 to reach the final four.

Kuznetsova was down a set with Pliskova serving for the match but the Russian rallied thanks to 30 winners and six aces in the gruelling two hour, 23-minute clash.

Meanwhile, Madison Keys vanquished seven-time major champion Venus Williams 6-2 6-3 to set up a semi-final with fellow American Kenin.

Madison Keys ended Simona Halep's chances of reaching another Western & Southern Open final, while Naomi Osaka and Ashleigh Barty battled through.

A three-time runner-up in Cincinnati, Halep was edged by Keys at the WTA Premier event on Thursday.

The Romanian became the first top-four seed to fall, with Barty, Osaka and Karolina Pliskova booking their spots in the quarter-finals.

 

KEYS EDGES HALEP IN THRILLER

Keys, the American 16th seed, served 10 aces on her way to a 6-1 3-6 7-5 victory over fourth seed Halep in the third round.

Halep came from 3-0 down in the final set and saved a match point in the 10th game, but Keys broke again to claim her win.

Having lost finals in Cincinnati in 2015, 2017 and 2018, Halep fell short of reaching another decider.

Keys will face Venus Williams after the American veteran beat Donna Vekic 2-6 6-3 6-3.

 

BARTY, OSAKA MOVE THROUGH

Barty was pushed before getting past Anett Kontaveit 4-6 7-5 7-5 in two hours, 10 minutes.

The Australian found herself 5-3 down in the final set before winning four straight games to advance.

Barty will meet Maria Sakkari, who upset Belarusian ninth seed Aryna Sabalenka 6-7 (4-7) 6-4 6-4.

Osaka was also forced to three sets by Hsieh Su-wei before claiming a 7-6 (7-3) 5-7 6-2 victory.

Awaiting the Japanese star in the last eight is Sofia Kenin, who beat Elina Svitolina for the second time in as many tournaments with a 6-3 7-6 (7-3) victory.

 

PLISKOVA, KUZNETSOVA PROGRESS

Pliskova, the 2016 champion, is yet to drop a set and was too good for qualifier Rebecca Peterson 7-5 6-4.

The Czech will meet Svetlana Kuznetsova after the 34-year-old wildcard crushed Sloane Stephens 6-1 6-2.

Naomi Osaka and Simona Halep battled into the last 16 at the Western & Southern Open, while Ashleigh Barty crushed Maria Sharapova.

Osaka is back at world number one and the Japanese star moved through her second-round match at the WTA Premier event in Cincinnati on Wednesday.

Like Osaka, Halep – a three-time runner-up – was tested, while Barty needed less than 90 minutes to thrash Sharapova.

 

OSAKA, HALEP PUSHED TO THREE

Osaka needed more than two hours to overcome Aliaksandra Sasnovich 7-6 (7-3) 2-6 6-2 in the second round.

She had won her previous three meetings with the Belarusian in straight sets, but was pushed at the hard-court tournament.

Osaka will next face Hsieh Su-wei, who got past qualifier Jennifer Brady 7-6 (11-9) 6-3.

Halep, a finalist at the event in 2015, 2017 and 2018, came from a set and a break down to beat Ekaterina Alexandrova 3-6 7-5 6-4.

The Romanian will meet Madison Keys, who eased past Daria Kasatkina 6-4 6-1.

 

BARTY BRUSHES PAST SHARAPOVA

A surprise last-32 loser at the Rogers Cup, Barty dominated Sharapova in a 6-4 6-1 victory.

The Australian broke serve four times during her 40th win of the season while continuing Sharapova's rough 2019.

Sharapova, a five-time grand slam champion, holds just an 8-6 win-loss record in 2019.

Barty will meet Anett Kontaveit, who was too good for Polish teenager Iga Swiatek 6-4 7-6 (7-2).

 

PLISKOVA, SVITOLINA THROUGH ON GOOD DAY FOR SEEDS

Champion in 2016, Karolina Pliskova was untroubled by Wang Yafan, winning 6-1 6-3.

Meanwhile, Aryna Sabalenka, the ninth seed, cruised past Zheng Saisai 6-4 6-3.

Elina Svitolina will face Sofia Kenin after their 6-4 6-1 wins over Elise Mertens and Zarina Diyas respectively, while Sloane Stephens and Donna Vekic – who beat Victoria Azarenka – progressed along with Svetlana Kuznetsova and Rebecca Peterson.

Ashleigh Barty and Sloane Stephens bowed out of the Rogers Cup on a day of upsets in Toronto on Tuesday.

World number one Barty and last year's runner-up Stephens were two of five seeds to fall at the WTA Premier tournament in Canada.

While that pair departed in the second round, Madison Keys, Aryna Sabalenka and Anastasija Sevastova were first-round losers.

 

BARTY, STEPHENS BOW OUT

In action for the first time since Wimbledon, Barty suffered a shock 6-7 (5-7) 6-3 6-4 loss to American Sofia Kenin.

The Australian is now at risk of losing her top ranking, with Naomi Osaka and Karolina Pliskova having the chance to return to number one.

The only way Barty will remain number one is if Osaka loses her opening match and Pliskova fails to reach the semi-finals.

Runner-up last year, Stephens went down to qualifier Marie Bouzkova 6-2 7-5 for her third straight loss.

SEEDS SLIP UP

Keys almost got through her opener, but eventually lost to Donna Vekic 3-6 7-6 (7-5) 7-6 (7-5) after squandering three match points.

The American, runner-up in 2016, served for the match at 5-4 in the second set, only to give up a 40-0 lead before bowing out.

Sabalenka was also edged, going down to Anastasia Pavlyuchenkova 3-6 6-3 7-5.

Sevastova, the 10th seed, was beaten by China's Zhang Shuai 7-6 (7-5) 6-2, with Kiki Bertens the only seed to progress.

Bertens thrashed qualifier Francesca Di Lorenzo 6-2 6-1 in just over an hour.

 

AZARENKA POWERS THROUGH, VENUS DEPARTS

Victoria Azarenka booked her spot in the second round thanks to a 6-2 6-2 victory over Camila Giorgi.

The 2014 runner-up Venus Williams, meanwhile, was well beaten by Carla Suarez Navarro 6-4 6-2.

In an all-Canadian clash, Bianca Andreescu got the better of wildcard Eugenie Bouchard 4-6 6-1 6-4.

Top seeds Sloane Stephens and Madison Keys suffered shock first-round losses at the Citi Open, while Coco Gauff also departed on Tuesday.

Stephens, the 2015 champion and top seed, went down to Swede Rebecca Peterson 6-2 7-5 at the WTA International event in Washington.

Peterson managed to break Stephens' serve five times on her way to an upset win over the world number eight.

Keys was also stunned, losing to 17-year-old wildcard Hailey Baptiste, who was playing her first WTA Tour main-draw match and claimed a 7-6 (7-4) 6-2 win.

In main-draw action for the first time since her incredible run to the last 16 at Wimbledon, 15-year-old Gauff bowed out with a 6-4 6-2 loss to Zarina Diyas.

While Stephens and Keys were upset, two other seeds – Hsieh Su-wei and Monica Puig – encountered no problems.

Hsieh brushed past Kirsten Flipkens 6-4 6-3 and Puig was too good for wildcard Allie Kiick 6-4 6-2.

Kristina Mladenovic beat Shelby Rogers 6-4 6-4, wildcard Catherine Mcnally overcame Zhu Lin 6-4 6-2 and Camila Giorgi got past Sachia Vickery 6-2 7-5.

Cori Gauff followed up her victory over Venus Williams by easing past Magdalena Rybarikova in straight sets to book her place in the third round at Wimbledon.

Teenage sensation Gauff showed her win against five-time Wimbledon champion Williams was no fluke with a dominant 6-3 6-3 triumph over Rybarikova on No.1 Court.

Earlier on Wednesday, Simona Halep progressed from an all-Romanian tie against Mihaela Buzarnescu, while third seed Karolina Pliskova continued her hunt for a first grand slam prize with a convincing 6-0 6-4 win over Monica Puig.

Caroline Wozniacki was made to work hard by debutant Wimbledon Veronika Kudermetova, eventually prevailing 7-6 (7-5) 6-3 victory, with Anett Kontaveit dispensing of Heather Watson.

It was not all plain sailing for the favourites, though, as Anastasija Sevastova and Madison Keys – 12th and 17th seeds respectively – crashed out.

Margarita Gasparyan, meanwhile, was left in tears as – after she suffered an awkward landing – she had to retire with the score at 5-7 6-5, handing eighth seed Elina Svitolina a reprieve.

HISTORY MAKING GAUFF ROLLS ON

Gauff stunned Williams in the first round, and clearly took plenty of confidence into Wednesday's clash with Rybarikova, making light work of her opponent to set up a third-round tie with Polona Hercog, who beat Keys 6-2 6-4.

"I think I played well, especially on the pressure points. She was serving amazing so it was hard to return sometimes," 15-year-old Gauff told BBC Sport.

"There's so much going on. I'm still shocked that I'm even here. I think I can beat anyone who's across the court. If I don't think I can win the match then I won't even step on the court."

 

HALEP HOLDS FIRM

Former world one Halep dominated early but lost her form in the second set to hand compatriot Buzarnescu a lifeline.

Halep rallied to break twice and win the third set, though, and she will now face two-time semi-finalist Victoria Azarenka, who overcame Ajla Tomljanovic 6-2 6-0.

"I think I'm playing okay. It's always tough on grass. But it was a tougher match than first one, so it was good that I could win it," Halep told a news conference. "I felt confident on court. I felt strong mentally."

 

WOZNIACKI EGES IT AS PLISKOVA CRUISES

Like Halep, Wozniacki was also run close in her contest with Kudermetova, who stunned the world number 19 when they met at the French Open in May.

Kudermetova forced a tie-break in the first set, but Wozniacki's experience eventually told when she reeled off the last two points in a row before closing out the win in style.

Pliskova, meanwhile, had no such issues against Puig, hitting nine aces and 23 total winners in her one-hour victory.

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