American teenager Amanda Anisimova has pulled out of the US Open after her father died.

The Women's Tennis Association (WTA) confirmed the news and said it sent its "deepest condolences" to Anisimova, with fellow players also expressing sadness over the death.

Russian-born Konstantin Anisimov played a key role in coaching his 17-year-old daughter, who reached the French Open semi-finals in June.

No details of his death have been given.

Anisimova is ranked 24th by the WTA, climbing rapidly after beginning the year as the world number 95.

Fellow American teenager Coco Gauff, who Anisimova beat in the girls' singles final at the 2017 US Open, wrote on Twitter: "Deepest condolences to the Anisimova family during this tragic time"

Maria Sharapova was another to express her sorrow at the news.

Anisimova has been out of action recently because of a back injury but was hoping to play the final grand slam of the year.

The tournament begins next Monday, August 26, at Flushing Meadows in Queens, New York.

Coco Vandeweghe's tough return from injury continued with a loss at the Bronx Open, where Andrea Petkovic upset a seed on Monday.

Vandeweghe returned in July after a 10-month injury absence, but the two-time grand slam semi-finalist is still looking for top form.

The American has lost three of four matches since making her comeback, the latest of which was a 6-3 6-0 defeat to lucky loser Anna Blinkova at the WTA International event.

Another former grand slam semi-finalist, Petkovic upset fourth seed Zhang Shuai 6-3 6-4 in the first round.

Petkovic will meet Camila Giorgi after the Italian brushed past Margarita Gasparyan 6-3 6-2.

Three seeds – Katerina Siniakova, Aliaksandra Sasnovich and Karolina Muchova – moved through, while Yulia Putintseva joined Zhang in exiting.

Other first-round winners were Fiona Ferro, Mihaela Buzarnescu, Kristie Ahn, Magda Linette and Anastasia Potapova.

Alize Cornet and Bernarda Pera cruised into the Bronx Open second round on a rain-hit Sunday in New York City.

Cornet recorded a 6-4 6-2 victory over Kateryna Kozlova at the inaugural edition of the WTA International tournament.

The Frenchwoman made it two wins in as many meetings with Kozlova, converting five of seven break points in a dominant showing.

In the day's only other main-draw match, Pera – a wildcard – breezed past Veronika Kudermetova 6-0 6-2.

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.

Serena Williams withdrew from the Western & Southern Open ahead of her opening match due to the back injury she suffered in Toronto.

Williams, 37, was due to face Zarina Diyas in Cincinnati on Tuesday, but pulled out as the American great continues to struggle with her back.

The 23-time grand slam champion retired during the Rogers Cup final against Bianca Andreescu on Sunday due to back spasms.

"I came to Mason on Sunday and have tried everything to be ready to play tonight, and was still hopeful after my practice this morning," two-time champion Williams said, via the tournament's Twitter account.

"But unfortunately my back is still not right."

Williams' withdrawal is a concern with the US Open less than two weeks away and the veteran still aiming to equal Margaret Court's record of 24 grand slam titles.

Jessica Pegula, the Citi Open champion, has taken Williams' place and will face Diyas, who knocked her out in qualifying.

Coco Gauff will have the opportunity to build on her sensational Wimbledon run after being handed a wildcard at the US Open.

The 15-year-old lit up the All England Club with a run to the fourth round, beating Venus Williams before losing to eventual champion Simona Halep.

There are limits to the number of tournaments Gauff can enter due to her age, yet she has been granted a spot at Flushing Meadows.

Gauff last year won the girls' doubles at the US Open alongside Caty McNally, who has also been given a wildcard.

The teenage duo linked up again to win the women's doubles at Citi Open earlier this month.

McNally reached the main draw at Wimbledon, too, and is joined by two other 17-year-old American wildcards in Whitney Osuigwe and Katie Volynets.

Samantha Stosur, the 2011 US Open champion, has also been invited this year.

Bianca Andreescu's Rogers Cup victory over Serena Williams means the Canadian has now won her first seven career matches against top-10 opponents.

Williams was in tears after she was forced to retire early with an upper back injury during Sunday's final in Toronto.

Teenager Andreescu was 3-1 and a break up in the first set when Williams declared she could not continue, and the 23-time grand slam champion now faces a race to be fit in time for the US Open.

Williams' misfortune meant Andreescu became the first home winner of the WTA Premier tournament since Faye Urban in 1969, and though the triumph came under mitigating circumstances, it has also extended an extraordinary run for the Canadian.

Since beating then world number one Caroline Wozniacki in her first match against a top-10 opponent in Auckland in December, Andreescu has won all six of her encounters with the WTA's leading singles players.

Andreescu beat Elina Svitolina and Angelique Kerber on her way to winning her first singles title at Indian Wells in March, before defeating the 2018 Wimbledon champion again two weeks later in Miami.

After a shoulder injury forced her to miss the French Open, Andreescu picked up where she left off in Toronto, beating world number five Kiki Bertens in the round of 16 and world number three Karolina Pliskova en route to the final.

With the US Open just around the corner, Andreescu looks well placed to make her mark in a grand slam at Flushing Meadows.

Serena Williams hopes the back injury that saw her retire during the Rogers Cup final disappears after a "small window".

The American great was 3-1 down to Canadian teenager Bianca Andreescu in Sunday's decider in Toronto when she retired due to back spasms.

Williams, 37, was in tears on court, but revealed the spasms usually lasted less than two days.

"That's the most frustrating part. I've had this before and it's like 24-36 hours where I'm just in crazy spasm and then it's like gone," the 23-time grand slam champion told a news conference.

"That's a little frustrating for me because I know that I can play, I just can't play today.

"So, I don't know, I'm just taking it a day at a time and see, usually what happens is it continues like that with just that small window and see if I improve after that small window."

Williams enjoyed a fine run in Toronto, improving her win-loss record this year to 19-5.

The veteran said she initially felt her back during a tough three-set win over Czech qualifier Marie Bouzkova in the semi-finals on Saturday.

"It started yesterday in my match and it just got worse," Williams said.

"My whole back just completely spasmed and to a point where I couldn't sleep and I couldn't really move and so I was just trying to figure out how do you play a match where you have no rotation?"

Serena Williams was in tears as she retired early in the Rogers Cup final due to an upper back injury, handing unseeded teenager Bianca Andreescu the title in her homeland.

Williams, attempting to claim her first WTA Tour title since returning from maternity leave, was a break down at 3-1 in the first set in Toronto on Sunday when she declared she was unable to continue.

The 23-time grand slam singles champion sobbed as she was embraced by the 19-year-old Andreescu, after succumbing to an injury setback just a fortnight before the US Open gets under way.

Andreescu becomes the first home winner of the WTA Premier tournament since Faye Urban beat Vicki Berner in an all-Canadian final 50 years ago.

Powerful Ontario native Andreescu will rise to 14th in the world on Monday, replacing Amanda Anisimova as the highest-ranked teenager in the women's game.

The gifted youngster claimed her maiden WTA singles title at Indian Wells in March and will be one to watch in the final grand slam of the year at Flushing Meadows next month.

In the post-match presentation, Williams said: "Oh my gosh. Thank you, guys. I'm sorry I can't do it today, I tried but I just couldn't do it. Bianca, you are a great sportswoman. Thanks to my team.

"It's been a tough year, but we'll keep going."

Williams has now featured in four finals since giving birth to her first child in September 2017, failing to win any of them.

Andreescu spent a spell on the sidelines after pulling out of the French Open due to a shoulder injury and expressed sympathy for her iconic opponent, who is 18 years her senior.

"Serena, you made me cry a bunch over there," said Andreescu. "I know what it's like to pull out of tournaments and be injured. But you're truly a champion, I've watched you play so many times. You are truly a champion on and off the court.

"I'm speechless right now. I'm the first Canadian to make the final and win this tournament since 1969. This week has not been easy, I've had many many tough matches, and especially what I've been through the last two months hasn't been easy. I kept telling myself never give up."

Serena Williams survived a scare before getting past Marie Bouzkova in the Rogers Cup semi-finals on Saturday.

The American great made another slow start at the WTA Premier event, but again recovered to reach the final courtesy of a 1-6 6-3 6-3 victory over Czech qualifier Bouzkova.

Williams moved into her 96th WTA Tour final and fifth at the Rogers Cup, where she is a three-time champion and will face Bianca Andreescu in the decider in Toronto.

But the 23-time grand slam winner looked in trouble early, dropping her first set of the tournament against the 21-year-old Bouzkova.

Williams committed 18 unforced errors in the first set, a backhand into the bottom of the net seeing her drop the opener.

Needing a response, Williams broke in the seventh game of the second set, crushing a forehand return winner on her way to winning the final four games of the set.

Bouzkova threatened to land the first blow of the decider, but Williams saved three break points in the third game.

That would prove to be crucial as she broke in the following game, taking a 3-1 lead she would not relinquish.

Andreescu awaits in the final after the 19-year-old Canadian overcame Sofia Kenin 6-4 7-6 (7-5) in the day's earlier semi.

She became the first Canadian to reach the women's singles final at the modern Rogers Cup and first since 1969, when the event was called the Canadian Open.

Naomi Osaka was offered a dose of reality after her winning start against Serena Williams was ended, but the Japanese claimed defeat meant she "accomplished [her] dream".

Two-time grand slam champion Osaka will return to the world number one ranking next week, yet she crashed out of the Rogers Cup on Friday in a 6-3 6-4 defeat to Williams.

The all-time WTA great is an icon for Osaka; however, the 21-year-old had won their only two prior meetings - including an incredible US Open final in which Williams repeatedly ranted at the officials.

Humbled this week in Toronto, Osaka acknowledged this loss belatedly provided the experience she had always anticipated when facing Williams.

"For me, it's always fun to play her," she told a news conference. "This is someone that I looked up to forever.

"And, actually, this is how I thought the first time I played her in Miami was going to go.

"So in a weird way, losing today, I accomplished my dream. I know that sounds kind of weird, but if there's anyone in the world that I would want to lose to - of course I would never want to lose - I don't mind losing to her, because I learned a lot.

"And this is someone that I kind of modelled my game after when I was little. So this is such a big learning experience for me."

Osaka said Williams played "amazing, which is what she does", and the victor agreed her level had improved from the pair of 2018 defeats.

"I knew [Osaka's] game a little bit more, so that's a little easier," Williams said. "And I'm just overall a little bit better. You know, last year was a miraculous year for me, to be honest.

"So I know her game. I watch her a lot. I knew what I needed to do to hopefully try to get a win today, and it helped a little bit."

As Williams advances to face Marie Bouzkova, Osaka will work to defend her restored ranking more successfully than last time.

Osaka's form fell off a cliff after taking number one with the Australian Open title and she later conceded the pressure had been tough to handle.

She explained on Friday: "I guess I'm excited. But also, at the same time, I feel like that's a position that I think requires a lot of work and a lot of just hardheadedness.

"I can't really let what other people say affect me, and I just have to keep working hard and putting effort. I think that the results, of course, will show, but I have to not think too much about winning or losing."

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