The 20-year-old Belgian easily beat France's Amelie Mauresmo in the final to pick her ninth title of the year.
Caroline Woznaicki produced an almost perfect display to dismantle world number one Simona Halep 6-0 6-2 at the WTA Finals on Wednesday, the Dane recording her second dominant victory in as many matches.
Angelique Kerber showed more passion in the media centre than on the court when she crashed out of last year's WTA Finals, the German angered by the format and frustrated by her inability to win the set off an eliminated opponent she needed to advance.
A day after suffering her heaviest defeat since she was a teenager, Serena Williams was back to her brilliant best as she swatted aside Eugenie Bouchard 6-1, 6-1 in her final round robin match at the WTA Finals on Thursday.
Osaka will take plenty of positives out of the contest
Simona Halep has moved back to the top five in the latest women's tennis world rankings issued by the WTA, after clinching her first title in over a year at the Madrid Masters.
Serena Williams has extended her lead in the WTA rankings after her fourth consecutive Grand Slam title at Wimbledon, with the World No 1 now having more than twice as many points as her closest competitor Maria Sharapova.
Russia's Svetlana Kuznetsova raced to a 6-2, 6-1 victory over Australian Daria Gavrilova to defend her Kremlin Cup title in Moscow on Saturday and secure a place at the season-ending WTA Finals.
The Indian tennis star has jumped up two places to 75th in the latest WTA Tour tennis rankings.
The Women's Tennis Association has agreed to reinstate byes in certain events in 2009 to assuage players' fears about a congested calendar. Several players were worried they were being asked to play two high-intensity events in succession, with no byes meaning there was no opportunity to rest between tournaments.
Dominika Cibulkova kept her hopes of reaching the last four of the WTA Finals alive with a gritty 6-3, 7-6(5) Red Group victory over Simona Halep at the Singapore Indoor Stadium on Thursday.
Victoria Azarenka moved a step closer to securing the year-end No. 1 ranking with a 6-7, 7-6, 6-4 win over Germany's Angelique Kerber at the WTA Championships on Wednesday.
Top seed Simona Halep was pooled with grand slam winners Maria Sharapova and Flavia Pennetta in a formidable looking Red Group for the end-of-season WTA Finals on Friday.
The former World No 1, who returned to the tour in April following a 15-month doping ban, started the stronger, breaking Sabalenka in her opening service game, but struggled on serve and soon found herself trailing 4-1 in the first set.
Little-known Slovakian Magdalena Rybarikova won her first WTA title after beating China's Li Na 6-0, 7-6 at the Edgbaston Classic on Sunday.
Former world number one Karolina Pliskova is confident that splitting with coach David Kotyza will not be a hindrance as she attempts to go it alone over the home stretch of the season, leading up to the WTA Finals in Singapore next month.
Svitolina arrived in Singapore out of form yet determined to "silence the haters", who she said believed she did not deserve to be in the tournament, and the Ukrainian has played brilliantly to win all three pool matches and her semi-final.
Venus Williams has joined her sister Serena in withdrawing from the French Open because of injury, the WTA said on Saturday.
Halep became the first Romanian to reach the summit of the women's rankings when she beat French Open champion Jelena Ostapenko in the semi-finals of the China Open in Beijing, a feat she feels is the high point of her career to date.
Venus Williams defeated Russia's Vera Zvonareva 6-7, 6-0, 6-2 on Sunday to win the season-ending WTA Championships.
A member of French player Aravane Rezai's family has been banned from WTA events and is under investigation because of a "serious safety matter" affecting her "health and well being", the tour said on Sunday.
Top seeds Sania Mirza and Martina Hingis defeated Czech pair of Andrea Hlavackova and Lucie Hradecka in straight sets to virtually seal a women's doubles semi-final spot in the WTA Tennis Finals in Singapore.
An emotional Agnieszka Radwanska claimed her maiden WTA Finals title with a roller-coaster 6-2, 4-6, 6-3 victory over Czech Petra Kvitova in an absorbing encounter at a packed Singapore Indoor Stadium on Sunday.
India's Karman Kaur Thandi has clinched her second W60 ITF title of her career after winning at the Evansville event in the USA.
Angelique Kerber was forced to dig deep in her WTA Finals opener before the German world number one battled past Dominika Cibulkova 7-6(5), 2-6, 6-3 in a high-class baseline slugfest at the Singapore Indoor Stadium on Sunday.
Serena Williams's motivating factor in her WTA Championships triumph on Sunday was to save her own sanity, the American said after beating Maria Sharapova in the final of the season-ending tournament.
Dominika Cibulkova completed a remarkable debut at the WTA Finals when the Slovakian world number eight stormed to victory with an unlikely 6-3 6-4 triumph over top seed and world number one Angelique Kerber in the title showdown on Sunday. Cibulkova lost her first two round robin matches before beating Simona Halep to squeeze into the semi-finals and her victory on Sunday matches the feat of 2015 winner Agnieszka Radwanska, who captured the title with a 1-2 pool record.
Top seed Mara Santangelo of Italy, ranked 36, is potentially the only player who can stop the Indian ace from winning the Bangalore Open.
Sania Mirza and her Russian partner Elena Vesnina clinched their second WTA title together, lifting the Family Circle Cup doubles trophy with a straight-set triumph over Americans Bethanie Mattek-Sands and Meghann Shaughnessy in Charleston.
The decision to lift the ban was met with protest from Ukraine, whose Foreign Minister Dmytro Kuleba said it was "immoral" and urged Britain to deny Russian and Belarusian players visas.
The Indian, who was out of action since playing in the Fed Cup in Seoul, dropped three places in the latest rankings
Holder Elina Svitolina will face world number one Ash Barty in the end-of-season WTA Finals showpiece on Sunday after they got past Belinda Bencic and Karolina Pliskova respectively in the semi-finals at Shenzhen Bay Sports Centre.
The WTA Tour has criticised French Open organisers for awarding more prize money to the men competitors
The teenager from Hyderabad jumped eight places after she added 134 points at the US Open
The Indian ace was pushed down by Russia's Anna Chakvetadze and Spain's Anabel Medina Garriques, who occupy the 32nd and 33rd places respectively.
Indian tennis sensation Sania Mirza and zimbabwean Cara Black reached the quarterfinals of the WTA Paribas Open following a straight sets victory over Raquel Kops-Jones and Abigail Spears, in Indian Wells.
Novak Djokovic will prepare for a tilt at an 11th Australian Open title by representing Serbia at the United Cup mixed team tournament while old rival Rafael Nadal and former women's world number one Naomi Osaka return at Brisbane after time away.
World number one Serena Williams was named WTA Player of the Year for a second time at a tour ceremony on Thursday. Williams, who did not attend the event, won the US Open last year and reached the Wimbledon final. She also claimed a gold medal with sister Venus in the doubles at the Beijing Olympics. In her career, the American has claimed ten Grand Slam titles and she was also the WTA Player of the Year in 2002.
World No 1 Serena Williams suffered one of the heaviest defeats of her long and illustrious career as she was humbled 6-0, 6-2 by Romanian Simona Halep at the WTA Finals on Wednesday.