Kiki Bertens' bid to retain her St Petersburg Ladies Trophy title remains alive but Petra Kvitova's run in Russia came to an end as she pulled out due to illness.

World number eight Bertens defeated teenage qualifier Anastasia Potapova 6-4 7-6 (7-3) having staved off three set points in a second set in which she was 5-2 down.

Bertens will face Ekaterina Alexandrova next after she was handed a walkover when third seed Kvitova withdrew.

Top seed Belinda Bencic was ousted by Maria Sakkari in three sets, with Elena Rybakina beating Oceane Dodin in the other quarter-final.

At the Thailand Open, world number four Elina Svitolina suffered a surprise straight-sets loss to Nao Hibino, who was joined in the semi-finals by Magda Linette, Patricia Maria Tig and Leonie Kung.

Kiki Bertens wasted little time in getting her St Petersburg Ladies Trophy defence up and running with a 6-1 6-2 demolition of Veronika Kudermetova.

The home hope found herself overmatched against the second seed from the off as Bertens surged into a 4-0 lead before a third break sealed the first set.

A break to cut the gap to 3-2 in the second proved a false dawn for Kudermetova, who failed to win another game after that as she was beaten in under an hour.

Another Russian, qualifier Anastasia Potapova, is up next for Bertens.

Third seed Petra Kvitova found the going somewhat tougher before prevailing 7-6 (7-1) 1-6 6-2 against Alison van Uytvanck in two hours and 16 minutes.

"Definitely, it was a tough one," Kvitova said, following a match featuring a remarkable 33 break-point opportunities.

"I’ve never played Alison before, and she'd already played one match on the surface, and for me it was the first one, so that's always a bit challenging."

Kvitova must now take on the in-form Ekaterina Alexandrova.

The Russian claimed her ninth straight win indoors as she beat seventh seed Donna Vekic 6-1 7-5, while Maria Sakkari was also a straight-sets winner over Alize Cornet.

At the Thailand Open, top seed Elina Svitolina made short work of Storm Sanders, blowing away the qualifier 6-1 6-2 in 57 minutes.

Magda Linette was a 7-5 6-1 winner against the experienced Peng Shuai in blustery conditions and has further Chinese opposition coming up after Wang Xiya defeated Barbara Haas 6-3 6-4.

Romania's Patricia Maria Tig also reached the quarter-finals in straight sets at the expense of sixth seed Yafan Wang.

Ash Barty is excited about her run at the Australian Open, but the world number one is trying to ignore the expectations of a nation.

Barty became the first Australian woman to reach the semi-finals of the tournament since 1984 by overcoming Petra Kvitova 7-6 (8-6) 6-2 on Tuesday.

However, while the 23-year-old French Open champion is happy with her run, Barty is ignoring the hype in Melbourne.

"I'm excited. My team's excited. We love the opportunity of getting another match out on that beautiful court," Barty told a news conference.

She added: "I don't pay attention to it [the nation being on her side] honestly. I'm here to try and do the best that I can.

"Obviously it's exciting. Hopefully I can bring a smile to a few faces around our country and around the world.

"For me, it's trying to do the best that I can, find that enjoyment for myself and my team."

Barty will face Sofia Kenin in the semi-finals after the American 14th seed beat Ons Jabeur.

Ash Barty ended a 36-year wait for her nation by reaching the Australian Open semi-finals with a straight-sets win over Petra Kvitova.

In a rematch of last year's quarter-final won comfortably by Kvitova, Barty secured a 7-6 (8-6) 6-2 victory on Rod Laver Arena on Tuesday.

The world number one became the first Australian woman to reach the last four at the tournament since Wendy Turnbull in 1984.

Barty, last year's French Open champion, will face American 14th seed Sofia Kenin in the last four.

The players traded breaks to love early before Barty fought out a tough hold after a 20-point seventh game.

Last year's runner-up Kvitova targeted Barty's second serve with plenty of success, but while four consecutive games went to deuce, both held serve through to a tie-break.

A 69-minute first set went Barty's way, winning the last three points of the tie-break – which was highlighted by a 22-shot point during which the Australian showcased her defensive abilities – thanks to Kvitova errors.

Barty broke in the opening game of the second set and again in the third, producing a delicate lob to take a 3-0 lead.

A desperate and aggressive Kvitova pulled one break back in the sixth game, but handed it straight back in the next with a double fault.

Barty managed to close it out in the next game, an ace out wide seeing her complete the job.

 

STATISTICAL BREAKDOWN 
Ash Barty [1] bt Petra Kvitova [7] 7-6 (8-6) 6-2

WINNERS/UNFORCED ERRORS  
Barty – 20/28
Kvitova – 28/38

ACES/DOUBLE FAULTS  
Barty – 5/3
Kvitova – 2/6

BREAK POINTS WON  
Barty – 4/8
Kvitova – 2/12

FIRST SERVE PERCENTAGE  
Barty – 63
Kvitova – 56

PERCENTAGE OF POINTS WON ON FIRST/SECOND SERVE  
Barty – 74/35
Kvitova – 63/45

TOTAL POINTS  
Barty – 82
Kvitova – 73

Ashleigh Barty avenged her fourth-round defeat at Wimbledon to Alison Riske by overcoming the American in three sets in the Australian Open fourth round.

The world number one battled to victory in an hour and 36 minutes to book a quarter-final meeting with Petra Kvitova, who came from a set down to beat Maria Sakkari.

Coco Gauff saw her brilliant week end in disappointment as she lost to compatriot Sofia Kenin, who is into the last eight of a grand slam singles tournament for the first time.

Qiang Wang, who stunned Serena Williams in round three, was defeated in straight sets by Ons Jabeur – another woman making major history in Melbourne.

NO REWARD FOR RISKE AS BARTY BATTLES ON 

Australia's hope for a home champion continues after Barty recovered from a miserable second set to defeat Riske for the first time. 

Riske won their first encounter in Eastbourne in 2016 before taking victory at Wimbledon last year, but Barty ended that losing streak with a 6-3 1-6 6-4 success. 

Barty was clinical in the opening set against too many errors from Riske, but the 29-year-old rallied in the second, breaking twice and dropping just five points on her own serve to force the decider. 

At 5-4, Barty set up match point with a backhand pass and Riske produced just her second double fault to hand victory to the favourite. 

"It was third time's a charm for me tonight," said Barty. "I just had to hang in there. It was very tough from both ends playing very differently. I just had to give myself a chance." 

Barty will face Kvitova next in a repeat of last year's quarter-final, the Czech having fought from a set down to defeat Sakkari.

"I love Petra, but let's hope she doesn't break my heart again on Tuesday!" said Barty, who was beaten 6-1 6-4 at Rod Laver Arena in 2019.

  

COCO MANIA DEPARTS MELBOURNE​, JABEUR MAKES HISTORY

Gauff's fairytale run came to an end at the hands of countrywoman Kenin, who steamrolled the 15-year-old 6-7 (5-7) 6-3 6-0 on Melbourne Arena.

American sensation Gauff dethroned defending champion Naomi Osaka in the previous round and she looked on track to reach the quarters in Melbourne.

However, fellow rising star and 14th seed Kenin blitzed Gauff to reach her first grand slam quarter-final.

Next up for Kenin is Jabeur after the Tunisian beat Chinese star Qiang Wang 7-6 (7-4) 6-1.

Wang eliminated 23-time slam singles champion Williams in the third round, however, she was unable to back it up on Sunday.

Jabeur, who hit 29 winners, became the first Arab woman to ever make a slam quarter-final.

KVITOVA RETURNS TO QUARTERS

Australian Open runner-up Kvitova avoided a major upset as she rallied past Sakkari 6-7 (4-7) 6-3 6-2 on Rod Laver Arena.

After losing a tight first set, two-time Wimbledon winner Kvitova hit 33 winners and broke Sakkari eight times en route to a fourth quarter-final in Melbourne.

Playing in front of a vocal Green contingent supporting Sakkari, Kvitova said: "When I was shaking the hand with the umpire, I told him it was like a soccer match today. I mean, it's nice on one side. On the other side, it's the tennis, and it's not a Fed Cup. It's strange. But it didn't bother me at all."

World number one Ash Barty made serene progress to the fourth round of the Australian Open as Naomi Osaka and Serena Williams suffered shock exits.

Coco Gauff claimed another famous scalp in the form of defending champion Osaka to join Williams' conqueror Qiang Wang in the next round.

In a mixed day for the American contingent, Alison Riske and Sofia Kenin also went through, but Madison Keys was knocked out in straight sets.

Petra Kvitova was in commanding form as she progressed, while Caroline Wozniacki saw her career come to an end with defeat.

OSAKA DEFENCE ENDS AS SERENA WAIT GOES ON

Gauff got revenge for a rout at the hands of Osaka at the US Open last year to claim the biggest win of her fledgling career, seeing off the number three seed 6-3 6-4.

Beaten 6-3 6-0 in just 65 minutes at Flushing Meadows, 15-year-old Gauff made the most of 30 unforced errors from her opponent to set up a meeting with compatriot Kenin, who defeated Shuai Zhang 7-5 7-6 (9-7).

Williams' wait for a 24th grand slam singles title goes on, the American beaten in 6-4 6-7 (2-7) 7-5 by Wang in a gripping encounter.

The 38-year-old, who hit 56 unforced errors to Wang's 20, confessed afterwards: "I just made far too many errors to be a professional athlete today."

OMINOUS SIGNS FROM BARTY AND KVITOVA

There were no such concerns for Barty, who dispatched Elena Rybakina 6-3 6-2 in 78 minutes.

The home favourite will face Riske in the fourth round, the American outlasting Julia Goerges 1-6 7-6 (7-4) 6-2.

Last year's runner-up Petra Kvitova progressed in similarly imperious fashion, seeing off Russian Ekaterina Alexandrova 6-1 6-2.

Kvitova, who is yet to drop a set at this year's event, will now face Maria Sakkari after her impressive 6-4 6-4 defeat of Keys.

 

TEARFUL WOZNIACKI BOWS OUT

Former world number one Wozniacki saw her career come to an end with a three-set defeat to Ons Jabeur.

The 2018 champion lost 7-5 3-6 7-5 to the Tunisian, who will play a fourth-round match at a major for the first time against Wang.

An emotional Wozniacki, who fought back from 3-0 down in the decider but was decisively broken in the 11th game, said afterwards: "I want to be out there fighting. I fought like my life depended on it."

Ash Barty and Serena Williams moved through at the Australian Open as Naomi Osaka and Coco Gauff set up a third-round showdown.

Home favourite and world number one Barty was untroubled on Rod Laver Arena on Wednesday, continuing her run in Melbourne.

Williams was below her best but still advanced during the night session as her bid for a record-equalling 24th grand slam title continued.

There is also the prospect of a mouthwatering showdown between two of the game's leading lights on Friday.

 

BARTY, SERENA UNTROUBLED

Barty brushed past Slovenian Polona Hercog 6-1 6-4 in just 66 minutes on the back of a consistent performance.

The Australian mixed 16 winners – nine of those from the forehand side – with 16 unforced errors, setting up a clash with Kazakh 29th seed Elena Rybakina.

Williams was left frustrated during the second set of her 6-2 6-3 victory over Tamara Zidansek.

The American star was pushed before advancing in one hour, 18 minutes, having committed 28 unforced errors, including 17 in the second set.

Next up for Williams is Wang Qiang, the Chinese 27th seed having rushed past Fiona Ferro 6-1 6-2.

 

OSAKA, GAUFF SET UP BLOCKBUSTER CLASH

Osaka's title defence stayed alive with a 6-2 6-4 victory over China's Zheng Saisai.

The Japanese third seed faces her biggest test yet in the third round, where Gauff awaits after the teenager's comeback win.

Gauff looked set for an exit, trailing Sorana Cirstea 3-0 in the final set.

But the 15-year-old fought back to claim a 4-6 6-3 7-5 victory and reach the third round at a grand slam for the third straight time.

Osaka crushed Gauff 6-3 6-0 when the pair met at last year's US Open.

 

WOZNIACKI STAYS ALIVE AS KVITOVA, KEYS ADVANCE

Caroline Wozniacki stretched her professional career for at least another match by beating Ukrainian 23rd seed Dayana Yastremska 7-5 7-5.

The 2018 Australian Open champion, who is retiring at the end of the tournament, came from 5-1 down in the first set and 3-0 behind in the second.

Last year's runner-up, Petra Kvitova, was tested in a 7-5 7-5 victory over Spain's Paula Badosa while Madison Keys also had moments of concern in her 7-6 (7-3) 6-2 win over Arantxa Rus.

Petra Martic (13) and Aryna Sabalenka (11) were among the seeds to fall, with the latter beaten by Carla Suarez Navarro in their opening-round clash.

World number one Ash Barty was relieved to come through the "chaos" of a first day of few shocks at the Australian Open.

Home favourite and top seed Barty had to come from a set down to progress in Melbourne, beating Lesia Tsurenko 5-7 6-1 6-1.

The Queenslander ensured she joined several other big names in advancing, with defending champion Naomi Osaka triumphing along with Serena Williams and Petra Kvitova - straight-sets winners over Anastasia Potapova and Katerina Siniakova respectively.

Venus Williams did not follow her sister into round two, though, as she fell to 15-year-old Coco Gauff once again.

Gauff had already beaten fellow American Williams at Wimbledon last year and pulled off a repeat on Monday.

Sloane Stephens crashed out 2-6 7-5 6-2 to Zhang Shuai, while Barbora Strycova lost to Sorana Cirstea in straight sets, but fellow seeds Petra Martic, Sofia Kenin and Ekaterina Alexandrova all advanced.

Caroline Wozniacki, who will retire at the end of the tournament, prolonged her career by easing past Kristie Ahn 6-1 6-3.


BARTY GETTING BETTER AT EACH SLAM

Barty won the French Open last season and feels she is improving with the experience of every major.

"It's always a little bit different, I think," she said. "Slams always feel like there's a lot of chaos going because there's so many people.

"It's busy with singles and doubles players, mixed players, families, coaches, everyone underneath. It's just chaos.

"When you're able to separate that from when you step on the court is when you can do a little bit better, play a little bit better, feel a little bit more comfortable.

"I feel like we've been able to do that better and better with each slam that I've played. It's an experience thing. You have to learn how to deal with it, but it's getting better."

Reflecting on her role as a home favourite and the top seed, Barty added: "I feel like I'm doing it the best way that I know how. I'm doing it with my team. We're doing it as a team.

"We're loving it. We're embracing it. There's no other way to approach it. I think we're just going along for the ride, trying to play some good tennis."


VENUS: THE SKY'S THE LIMIT FOR COCO

Seven-time grand slam winner Venus Williams knows a thing or two about champions, and she expects new nemesis Gauff to go all the way to the top.

Asked if the teenager has a "champion's mentality", Williams replied: "She clearly wants it, works very hard, is extremely mature for her age. I think the sky's the limit for her."

The veteran was impressed by Gauff's mentality, adding: "She just played very focused and put a lot of balls in the court. That's what you have to do.

"She'll play well for the rest of the event."


WOZNIACKI 'TRYING TO ENJOY THE MOMENT'

Knowing her career is coming to an end, Wozniacki acknowledged she found it difficult to keep her emotions in check.

But the 2018 champion is determined to enjoy her final days at the top of the sport.

"I feel good, having won my first match here. It's always tricky, especially knowing it's my last tournament," she said. "There's a lot of just emotions, but I tried to keep them in check, and I thought I did that very well today.

"I think I'm just really trying to enjoy every moment. I don't know that there is one particular moment, but there is once in a while where you're like, 'Wow, this really is my last one'.

"You never know, it [could be] still two weeks from now. But every match you go out there, I'm just going to give it everything that I have, because it could be the last."

The 108th edition of the Australian Open begins on Monday as the world's best tennis players battle it out at the first grand slam of 2020.

Novak Djokovic and Naomi Osaka will return to defend the titles they won last year, adding to the event's storied history.

The pair will face stiff competition from stacked fields in the men's and women's draw as a host of players seek glory in Melbourne.

To whet your appetite for the forthcoming feast of tennis, here is a selection of the best Opta facts related to the Australian Open.

 

- The last three years have seen the 12 women's grand slam tournaments being won by 10 different players; only Simona Halep and Osaka have won twice in that span.

- Djokovic won his seventh Australian Open title in 2019, the most of any male player in the history of the tournament. He has won the event every time he has reached the semi-finals.

- Of the last 14 editions of the Australian Open, 12 have been won by either Djokovic (7) or Roger Federer (5) – Rafael Nadal (2009) and Stan Wawrinka (2014) are the only other winners in that period.

- Victoria Azarenka (2012, 2013), Serena Williams (2009, 2010) and Jennifer Capriati (2001, 2002) are the only women to have won successive titles at the Australian Open since 2000.

- Federer won his sixth Australian Open title in 2018, 14 years after his first win at the event; no player has won multiple Australian Open titles over a longer period in the Open Era. It is his last win in a grand slam tournament to date.

- Since 2005 only Williams (2010, 2015) and Azarenka (2013) have won the title at the Australian Open as the number one ranked player in the world.

- Williams has not won any of the last 11 grand slams, with her last victory coming at the Australian Open in 2017 when she was pregnant – this is the American's longest span without a major title.

- Petra Kvitova lost in the final of the Australian Open last year, the only time she went further than the quarter-finals in her last 19 grand slam appearances, since winning Wimbledon in 2014.

- Either Nadal or Andy Murray has been the runner-up in nine of the last 10 Australian Open men's finals, Murray losing five times and Nadal four. Marin Cilic in 2018 is the only other player to lose an Australian Open final in that span.

- The last time an Australian made it to the men's final at the Australian Open was Lleyton Hewitt in 2005 and the last Australian to win the title was Mark Edmondson in 1976 (against fellow Australian John Newcombe).

Petra Kvitova admitted she was worried about the air quality in Melbourne ahead of the Australian Open, particularly as an asthma sufferer.

The year's first grand slam has been impacted by poor air quality in Victoria's capital after bushfires ravaged Australia in recent months.

Organisers have faced criticism during the qualifying rounds, although air quality has been rated as 'good' in Melbourne since Thursday.

Kvitova, who suffers from asthma, said the air was a concern heading into the grand slam.

"I've been a bit worried about it. Now I'm very happy that, as I mentioned, the sky, it's there again clearly," last year's runner-up told a news conference on Saturday.

"Of course everybody knows that I do have asthma problems, which I wasn't really happy about that if the air is still bad.

"It's same for everybody, so it will be really difficult to breathe for sure. I do have my medicines here, as well.

"Yeah, I'm going to use it if it's important."

However, Kvitova – who faces fellow Czech Katerina Siniakova in the first round – backed officials.

"Well, I'm very comfortable with everything they've taken," she said.

Serena Williams was in brilliant form to reach the Auckland Open final, while Karolina Pliskova saved a match point to beat Naomi Osaka in a thrilling Brisbane International semi.

Williams needed just 44 minutes to crush 18-year-old Amanda Anisimova 6-1 6-1 in their last four clash at the WTA International tournament in New Zealand.

The 23-time grand slam champion mixed 17 winners with six unforced errors and lost just nine points on serve. Williams served five aces and converted all five of her break points in a dominant display in the lead up to the year's first grand slam in Melbourne.

The American moved into her 98th WTA Tour final and will be aiming for a 73rd title but first since the 2017 Australian Open when she faces Jessica Pegula.

Pegula upset fifth seed Caroline Wozniacki 3-6 6-4 6-0 in their semi-final.

A two-time runner-up, Wozniacki – who will retire after the 2020 Australian Open – won just 10 points in the third set.

Wozniacki will contest the doubles final with Williams against Taylor Townsend and Asia Muhammad.

In Brisbane, Pliskova lost a first set on a tie-break in which she squandered two set points and saved four, and was staring down the barrel after Osaka broke for a 6-5 lead in the second.

However, Osaka's first serve on match point was overly tentative and a series of errors handed Pliskova the break back. The second seed took full advantage, winning the subsequent tie-break and taking the decider in comfortable fashion to defeat the reigning Australian Open champion 6-7 (10-12) 7-6 (7-3) 6-2.

Earlier, Madison Keys rallied past Petra Kvitova to clinch a 3-6 6-2 6-3 victory, meaning there will be no all-Czech final in Queensland.

At the Shenzhen Open, Russian Ekaterina Alexandrova clinched her maiden WTA Tour title with a 6-2 6-4 win over Elena Rybakina in the final.

Serena Williams described her victorious comeback as "solid" after she beat Camila Giorgi in straight sets at the Auckland Classic in her first match since the US Open.

The 23-time grand slam champion had taken a break after losing to Bianca Andreescu at Flushing Meadows.

Having warmed up with a doubles win alongside Caroline Wozniacki on Monday, Williams was back in singles action on Tuesday and cruised past Giorgi 6-3 6-2 in a little over another hour.

"I thought it was solid, technically my second match of the year," she said.

"Spent a long time off from tournament play, match play, so solid is pretty good. It's a great start to build on.

"It's definitely not easy [to get the rhythm back]. It's always hard to play a match early in the season."

Williams will face Christina McHale next and could meet 15-year-old Coco Gauff for the first time in the quarter-finals.

Her doubles partner Wozniacki, who will retire after the Australian Open, also progressed having dropped just one game against Paige Mary Hourigan.

Former world number one and defending Australian Open champion Naomi Osaka had more difficulties in beating Maria Sakkari 6-2 6-7 (4-7) 6-3 at the Brisbane International.

Sakkari had the momentum in the decider when she forged an early break, yet Osaka fought back and converted her second match point after double faulting with her first.

Petra Kvitova and Kiki Bertens, who, like Osaka, started the new season ranked in the world's top 10, also advanced in three sets with respective wins against Anastasia Pavlyuchenkova and Dayana Yastremska, while Jennifer Brady came from a set down to oust Maria Sharapova.

Belinda Bencic was eliminated at the Shenzhen Open, though, the world number eight and top seed beaten 3-6 6-3 6-3 by Anna Blinkova.

Defending champion and second seed Aryna Sabalenka was also knocked out as she suffered a straight-sets defeat to Kristyna Pliskova.

It was a decade dominated by the 'Big Three' and they delivered on multiple occasions on the biggest stages.

Roger Federer, Rafael Nadal and Novak Djokovic dominated the decade in men's tennis, winning 33 of the 40 grand slams on offer.

Djokovic claimed 15 of those, while Nadal (13) and Federer (five) built on what they had started in the early-to-mid 2000s.

And, when they matched up in deciders, the trio of greats produced some epic finals.

The women's decade was far more varied despite Serena Williams' dominance – the American winning 12 majors since 2010 – as they too delivered some enthralling deciders.

We take a look at some of the best major finals of the decade.

 

2012 Australian Open: Novak Djokovic bt. Rafael Nadal 5-7 6-4 6-2 6-7 (5-7) 7-5

In arguably the most gruelling grand slam final ever, Djokovic outlasted Nadal in a five-set thriller in Melbourne.

The all-time greats produced an epic battle that lasted five hours and 53 minutes – the longest slam final in history.

Nadal needed a comeback in the fourth-set tie-break just to stay alive in the decider, famously dropping to his knee in celebration after getting to a fifth.

But the Spaniard would cough up a break lead in the final set as Djokovic claimed an incredible win for his fifth grand slam crown.

2014 Wimbledon: Novak Djokovic bt. Roger Federer 6-7 (7-9) 6-4 7-6 (7-4) 5-7 6-4

A Federer-Djokovic final at the All England Club always delivers.

This one looked set to be a little more straightforward as Djokovic led two-sets-to-one and held a 5-2 advantage in the fourth.

However, Federer reeled off five straight games to force a decider.

Both players had their chances in the fifth set but Djokovic took his to clinch the title.

Federer finished with 75 winners and 29 unforced errors, while Djokovic had 68 and 27 respectively in a match he described as the "best quality grand slam final" he had played in.

 

2017 Australian Open: Roger Federer bt. Rafael Nadal 6-4 3-6 6-1 3-6 6-3

This was quite the occasion as two of the best ever went head to head in a grand slam final for the first time since 2011.

Its importance was also highlighted by the fact Federer held 17 majors to Nadal's 14 heading into the match, and can be understood even more greatly at the end of 2019 now that the pair are on 20 and 19 respectively.

As expected, the pair produced in front of an adoring Melbourne crowd.

After a to-and-fro battle to begin the final, Federer came from 3-1 down in the deciding set, having taken a medical time-out after the fourth.

2017 French Open: Jelena Ostapenko bt. Simona Halep 4-6 6-4 6-3

A stunning run at Roland Garros was completed in fine fashion – with an incredible comeback.

The unseeded Ostapenko may have accepted her run to the final was an achievement enough after the Latvian fell a set and 3-0 down to the tournament favourite.

Ostapenko may have levelled the match, but she then found herself 3-1 behind in the decider.

But, she produced another response, her first WTA Tour title coming at the French Open.

 

2019 Australian Open: Naomi Osaka bt. Petra Kvitova 7-6 (7-2) 5-7 6-4

Ostapenko may have delivered a huge comeback, but Osaka's ability to keep her cool against Kvitova at Melbourne Park earlier this year was even more impressive.

The Japanese star's maiden major win had been overshadowed by Williams' outburst at Flushing Meadows just months earlier and it seemed a potential second major title had been thrown away.

Osaka took the first set and led 5-3 with three championship points in the second, only to somehow drop the set altogether.

That would be enough to break even the greatest, let alone a 21-year-old on one of the sport's grandest stages.

Instead, Osaka composed herself, closing out an amazing victory for her second major title.

2019 Wimbledon: Novak Djokovic bt. Roger Federer 7-6 (7-5) 1-6 7-6 (7-4) 4-6 13-12 (7-3)

A history-making decider lasted just under five hours and, once again, Federer was left to rue a missed chance against Djokovic at the All England Club.

Djokovic saved two championship points in the fifth set as the two greats went to a final-set tie-break – the first in singles at Wimbledon. 

The Serbian edged it to win a 16th grand slam title, as not even 94 winners from the Swiss superstar were enough

Federer won 14 more points, hit 40 more winners and created 13 break points to eight, but was beaten.

World number one Ashleigh Barty booked her place in the WTA Finals semi-finals, before Belinda Bencic profited as Naomi Osaka's injury replacement Kiki Bertens also retired.

Barty, a debutant at the season-ending tournament, like Bencic, defeated Petra Kvitova 6-4 6-2 to bounce back from defeat to Bertens in her second Red Group match.

The French Open champion made light work of sixth-ranked Kvitova in Thursday's first encounter.

Needing a victory to guarantee her progress, Barty claimed her first win over the Czech in five attempts in confident fashion.

After a break of serve midway through the opening set saw the Australian edge in front, she wrapped up the second in less than 40 minutes with a third match point.

While Kvitova had already been eliminated ahead of facing Barty, the other match was a straight shoot-out for a last-four place between Bencic and Bertens.

And it was the Swiss, having denied Bertens a place in the original field with her victory in Moscow this month, who advanced due to her opponent's retirement with illness.

Bencic started on the front foot but, after failing to take advantage of her first two break points, fell behind at 3-2.

Yet Bencic responded in impressive fashion to take four successive games and the set, before Bertens, who had taken a medical timeout, stated she could not continue, trailing 7-5 1-0.

Barty and Bencic will learn the identity of their semi-final opponents on Friday, with defending champion Elina Svitolina through in the Purple Group as Simona Halep plays Karolina Pliskova for the opportunity to join her.

World number one Ashleigh Barty suffered a surprise three-set loss to last-minute addition Kiki Bertens at the WTA Finals on Tuesday.

Bertens was called in to take Naomi Osaka's spot after the Japanese suffered a right shoulder injury and the Dutchwoman promptly made an impact in the Red Group.

After losing the first set, Bertens battled back to triumph 3-6 6-3 6-4 in Shenzhen, claiming her first win over Barty at the sixth attempt.

Barty, who came from a set down to win her opening match against Belinda Bencic, was the first player to qualify for the season-ending tournament back in early September but she failed to justify her tag as favourite for the title in a largely disjointed display.

It was a contest in which breaks of serve were frequent and a run of five defined the opener, Barty edging that back-and-forth to nudge ahead.

She was a break up in the second as a similar pattern emerged, but a first-serve percentage of just 41 was always likely to prove problematic and Bertens was producing more winners to further tip the balance in her favour.

With Barty serving at 4-3 down, Bertens sensed her opportunity and was the primary aggressor, striking for the lines and putting the French Open champion on the back foot.

Having fought to take the contest into a third set, Bertens was in no mood to relent and she stormed into a 4-0 lead, even fluffing two break-point openings to make it 5-0.

Despite a rally that saw the gap cut to 4-3, the die was cast and Barty was consigned to defeat in a clash that lasted over two hours.

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