Kvitova and Vekic had played twice on Saturday after a rain delay on Friday but it was the Czech who did not drop a set in the entire tournament.
Halep sustained the injury last month while training for the Wuhan Open, where she lost in the second round. She then retired midway through her opener in Shanghai.
World No 1 Serena Williams showed her determination to defend her WTA Championships title by sweeping to a 6-3, 6-1 win over Angelique Kerber at the season-ending event on Tuesday.
The All India Tennis Association (AITA) on Thursday insisted that without its approval no ATP or WTA event can be organised in India. AITA sought to clear the air after some sections of the media quoted ATP as saying that it can sanction private bodies to hold events taking into account the organisers' ability and without any third party approval.
Sabalenka has always had the power and, since addressing the frequent on-court meltdowns that once blighted her career, has shown a frightening level of consistency at Grand Slams.
'I've played injured most of the year -- whether it was my elbow, my knee, or in the finals moments after a certain match in Flushing, my heart' 'I'm a fierce competitor and I want to compete as well as I can, for as long as I can'
Caroline Wozniacki claimed the biggest title of her career after the Dane staved off a ferocious Venus Williams fightback to take a 6-4, 6-4 triumph in the WTA Finals title showdown at a captivated Singapore Indoor Stadium on Sunday.
Five top contenders for the women's title at the US Open.
Venus Williams gained revenge for her Wimbledon final defeat by Garbine Muguruza when the American advanced to the last four of the WTA Finals with a gutsy 7-5 6-4 victory over the Spanish world number two on Thursday.
Poland's Agnieszka Radwanska stayed patient in the face of a barrage of big serving to advance to the last four of the WTA Finals for the third time in a row with a 7-5, 6-3 victory over Karolina Pliskova on Friday.
Sabalenka overpowers Raducanu, Osaka falls
American Stephens stayed calm and saw off an increasingly agitated Angelique Kerber in the winner-takes-all night match to complete round-robin play with a spotless 3-0 record after she wrapped up a 6-3, 6-3 victory against the German.
Madison Brengle filed a lawsuit against the Women's Tennis Association and the International Tennis Federation on Monday seeking damages for injuries she says were caused by the repeated drawing of blood for anti-doping tests.
Holger Rune rallied from a set down and saved a match point to defeat former champion Taylor Fritz 2-6 7-6(2) 6-3 on Wednesday and reach the Indian Wells quarter-finals where he will meet fourth seed Daniil Medvedev.
The president of the Russian Tennis Federation Shamil Tarpischev has been fined $25,000 and banned from the women's tour for a year after referring to Serena and Venus Williams as "the Williams brothers" on a television chat show last week.
The Thai lass beat Iroda Tulyaganova in the final to avenge her defeat at the Asian Games.
After a stomach injury cut short the last-leg of her season, Sania Mirza slipped two rungs to 32nd in the latest WTA Tour rankings.
Wimbledon champion Petra Kvitova was voted WTA's Player of the Year on Monday following a season in which she claimed her debut Grand Slam title, steered the Czech Republic to Fed Cup glory and shot up 32 places in the world rankings.
Garbine Muguruza continued her dream debut at the WTA Finals by completing round robin play with a perfect 3-0 record to advance to the semi-finals after a hard fought 6-4, 4-6, 7-5 victory over Petra Kvitova on Friday.
Svetlana Kuznetsova has the versatility and mentality to mark her out as the 'best player' on the WTA Tour.
His dream of being inside the global top-100 has been realised but Sumit Nagal is nowhere close to being a content man as the Indian tennis ace says he now faces the challenge of improving or holding on to his standing for direct entry into Grand Slams and the Paris Olympics.
Local favourite Thompson saved three match points before prevailing 5-7, 7-6 (6), 6-3 against Nadal, who was playing his first tournament after nearly a year out with a hip injury.
Doha will host the 2008-2010 WTA Tour season-ending championships, the most prestigious event on the women's tennis circuit.
Serena Williams capped off a season to remember by capturing her fourth WTA Championship title with a 2-6, 6-3, 6-0 win over Li Na on Sunday.
Simona Halep crushed Agnieszka Radwanska 6-2, 6-2 on Saturday to join Serena Williams in the championship decider at the WTA Finals.
Sania Mirza's preparations for the French Open were hurt as she suffered first round defeats in the singles and doubles events of a WTA tournament in Strasbourg.
Sania Mirza and Bethanie Mattek-Sands earned themselves a shot at their third title of the season by reaching the final of the WTA Porsche Tennis Grand Prix in Stuttgart.
Indian ace Sania Mirza and her Zimbabwean partner Cara Black ended the season and their partnership on a remarkable high by clinching the WTA finals women's doubles title with a comprehensive triumph in the summit clash in Singapore.
Garbine Muguruza made an imposing start to the WTA Finals by confidently swotting aside Czech Lucie Safarova 6-3, 7-6 (4) in their White Group opener on Monday.
The Indian ace rose to 44th in the singles list while her doubles standing also improved to 40th.
Sania Mirza's impressive showing at the Hobart WTA saw her move to world number 53.
The Belgian, who will succeed Mauresmo as world number one, claimed the first WTA Championships.
Maria Sharapova made light of her long injury layoff by advancing to the last four of the WTA Finals with an unbeaten record in round robin play after the Russian breezed past Flavia Pennetta 7-5, 6-1 on Thursday, and booked a surprise passage to the semi-finals for Agnieszka Radwanska.
Serbian Jelena Jankovic won her 12th career title with a 6-2, 6-4 demolition of second seed Caroline Wozniacki of Denmark at the Indian Wells WTA tournament on Sunday.
Out of action owing to a wrist injury, tennis ace Sania Mirza has risen a couple of rungs to 90th in the latest WTA singles rankings issued on Monday.
Serena Williams, who won the Australian and Wimbledon Grand Slam titles last year, was voted the WTA Tour 2009 Player of the Year for a second successive season, at a ceremony in Miami on Wednesday.
The Indian tennis sensation climbed three rungs to finish 37th in the latest WTA Tour rankings.
Martina Hingis, fresh off her induction into the International Tennis Hall of Fame, will end a nearly six-year retirement to play doubles at next week's Southern California Open, the WTA said on Tuesday.
The Indian star also maintained her doubles ranking to be at 18th spot in the latest rankings.