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.
The two cases shocked the tennis world with many fuming at how they were handled by the authorities.
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.
World number two Simona Halep beat Maria Sharapova 6-2, 6-2 in the China Open third round on Wednesday for her first win over the Russian in eight attempts.
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.
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.
Serena Williams shook off the rust and a feisty challenge from Serbia's Ana Ivanovic to open the defence of her WTA Finals title with a 6-4, 6-4 victory in the opening match of the elite eight-player tournament on Monday.
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.
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.
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.
Britain's Johanna Konta faces an anxious 24-hour wait before discovering whether she will make her debut at the WTA Finals in Singapore.
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.
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 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.
Prime Minister Narendra Modi congratulated Indian tennis ace Sania Mirza on winning the season-ending WTA Finals women's doubles title, calling it a 'proud accomplishment'.
Serena Williams destroyed Romania's Simona Halep 6-3, 6-0 on Sunday to win the WTA Finals championship in Singapore, proving once again why she remains the most formidable force in women's tennis.
Serena Williams regained her composure after smashing her racquet and being on the brink of defeat to beat Caroline Wozniacki 2-6, 6-3, 7-6 (6) on Saturday and reach the title match at the WTA Finals.
Ana Ivanovic recovered from her opening loss to race to a 6-1, 6-3 victory over an out-of-sorts Eugenie Bouchard on Wednesday, putting the world number seven back into the mix for a WTA Finals last-four berth.
Heading into the final, Gauff had lost the first set in three straight matches and the former U.S. Open champion seemed determined to buck that trend, serving to love in the opening game and breaking early for a 2-0 lead.
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.
Indian ace Sania Mirza and Switzerland's Martina Hingis entered the semi-finals of the WTA Finals after beating Taiwanese combination of Hao-Ching Chan and Yung Jan Chan 7-6 (12-10) 7-5 in Singapore on Friday. The Indo-Swiss pair will be pitted against the winner of the match between top seeds Caroline Garcia-Kristina Mladenovic and Bethanie Mattek-Sands- Lucie Safarova. It was a hard-fought two sets where both the teams held their service game till they reached 5 games all. It was in the 11th game of the first set that Sania and Hingis were broken. But the joy of their opponents was shortlived as they broke back in the very next game to take the first set into a tie-breaker.
'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'
Spain's Garbine Muguruza moved to the brink of the WTA Finals last four with a 6-4, 6-4 win over Angelique Kerber on Wednesday after Petra Kvitova opened her account with a 7-5, 7-5 victory over fellow Czech Lucie Safarova.
Aryna Sabalenka claimed her third Grand Slam title after winning the Australian Open twice.
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.
Svetlana Kuznetsova dug deep into her reserves to overcome Agnieszka Radwanska 7-5, 1-6, 7-5 in their WTA Finals round robin opener on Monday, the late-arriving Russian upsetting the defending champion in a thrilling encounter.
It was an emotional win for Aryna Sabalenka, who missed Wimbledon last month due to a shoulder injury.
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.
The 19-year-old beat the Japanese wildcard 6-2, 6-2 to set up a showdown with former US Open champion Sam Stosur, who downed American teenager Madison Keys 6-1, 6-2 in the other semi at the $250,000 event on the hard courts in Osaka.
Elina Svitolina stretched every sinew in a brilliant display of defensive tennis to register the biggest win of her career when she rallied for a 3-6, 6-2, 6-2 triumph over Sloane Stephens in an enthralling WTA Finals title decider on Sunday.
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.
While her career has featured a number of highs -- she has won two doubles Grand Slam titles and 11 WTA titles, including the Cincinnati Masters -- Garcia said she has become fixated on what she sees as her failures.
Agnieszka Radwanska rallied past an exhausted Garbine Muguruza to book her place in the WTA Finals title decider on Saturday with a 6-7(5), 6-3, 7-5 victory over the Spanish prospect in a classic encounter.
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.
Simona Halep crushed Agnieszka Radwanska 6-2, 6-2 on Saturday to join Serena Williams in the championship decider at the WTA Finals.
Maria Sharapova recovered from a second-set meltdown to record her first victory at this year's WTA Finals with a 7-5, 6-7(4), 6-2 triumph over Poland's Agnieszka Radwanksa on Friday but the Russian still bowed out of the elite eight-woman tournament.
Caroline Wozniacki put a huge dent in Maria Sharapova's bid to finish the season as world number one by overcoming some distracting bright lights to down the Russian 7-6(4), 6-7(5), 6-2 in their marathon opening group match of the WTA Finals on Tuesday.
Iga Swiatek has been not been at her world-beating best in the months leading up to the U.S. Open but the Pole has both the talent and mentality to lift her game for the final Grand Slam of the year, tennis great Chris Evert said.
Storm Hunter and Elise Mertens picked up the Doubles Team of the Year award, China's Zheng Qinwen was named Most Improved Player while Russian Mirra Andreeva won Newcomer of the Year.
Caroline Wozniacki 0-6, 6-3, 7-5 and advance to the last four at WTA Finals on Friday, the Frenchwoman topping the Red Group after top seed Simona Halep lost later in the day.