Roger Federer suffered a shock 3-6, 6-3, 7-6(4) defeat to Australian wildcard Thanasi Kokkinakis on Saturday that will cost the Swiss his world number one ranking and leaves the Miami men's tournament wide open.
World number one Simona Halep pulled out of next week's WTA Finals due to a lower back injury.
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.
Romania's Simona Halep pulled out of her final warm-up event before the Australian Open on Tuesday, saying she was suffering from gastroenteritis.
New coach Rainer Schuettler's experience as a former player at the top level has been invaluable for Wimbledon champion Angelique Kerber and the world number two believes her poor end to last season is truly behind her.
Maria Sharapova claimed her second French Open title when she floored Romanian fourth seed Simona Halep 6-4, 6-7(5), 6-4 after a marathon encounter in Saturday's final.
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.
Simona Halep trailed by a set and 5-1 against Elina Svitolina but somehow dug herself out of a hole before storming to victory to set up a semi-final against Karolina Pliskova.
One has nothing to lose, the other is expected to win on Saturday. Even though Romania's Simona Halep is the higher seed, at four, Maria Sharapova is the household name, the face on the billboards and is playing in her third successive French Open final.
Flavia Pennetta crushed Romanian second seed Simona Halep 6-1, 6-3 to kick off a packed day of action at the U.S. Open on Friday with a stunning upset that put the Italian into her first Grand Slam final.
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.
The 20-year-old, looking to become the first unseeded woman to lift the Suzanne Lenglen Cup since 1933, blazed her way to the final, hitting winners and errors with reckless abandon.
World No 1 Serena Williams edged an enthralling battle with third-seed Simona Halep.
Factbox on Romanian Simona Halep, who beat Serena Williams 6-2, 6-2 to win the Wimbledon title on Saturday:
Belgium's Elise Mertens rallied from a set down to beat top seed Simona Halep 3-6, 6-4, 6-3 and clinch her first Premier-level title at the Qatar Open on Saturday.
Spanish fourth seed Garbine Muguruza fine-tuned her preparations for this month's U.S. Open by crushing Simona Halep 6-1, 6-0 in the Cincinnati Open final on Sunday.
IMAGES from the matches played at the PNB Paribas Open at Indian Wells on Wednesday
World No 3 Simona Halep turned up the aggression and rallied for a 5-7, 6-1, 6-1 victory over Carla Suarez.
World number one Simona Halep saved three match-points before edging past an inspired Lauren Davis 4-6, 6-4, 15-13 in a thrilling marathon to reach the fourth round of the Australian Open on Saturday.
A summary of Tuesday's play at the French Open.
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.
Asked which thoughts, the world number two from Constanta said: "The only one, very tough thought is one set, 3-0 up, that I couldn't take that game.
Fifth seed Simona Halep narrowly avoided a third-round upset with a 6-1, 2-6, 6-4 win over Hungary's Timea Babos on Saturday to keep her US Open title hopes alive.
Serbia's Ana Ivanovic just missed out on a place in the semi-finals of the season-ending WTA Finals despite beating Simona Halep in the final group match on Friday.
Halep says she sent evidence about the contamination to the ITF in December and hoped her case would be heard by an independent tribunal in February but that it was postponed and then a new date in March had also been put back.
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.
Second seed Caroline Wozniacki came through a late wobble to reach the Australian Open final for a first time with a 6-3, 7-6(2) victory over Belgian Elise Mertens on Rod Laver Arena on Thursday.
The top-seeded Serb, who had not dropped a set in four matches since the round of 16 at the Australian Open in January, looked out-of-sorts throughout the 98-minute contest.
Simona Halep did something no one else was able to do against Serena Williams at the US Open on Wednesday but still could not stop the world number one from advancing to the semi-finals of the year's final Grand Slam.
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.
"I think she will win a Grand Slam. Which one and when I don't know, but definitely clay is a good surface for her."
Novak Djokovic maintained his unbeaten record against Frenchman Gael Monfils with a 6-3, 6-2 win in the semi-finals of the Rogers Cup in Toronto on Saturday, while Japan's Kei Nishikori also reached the final after beating Swiss second seed Stan Wawrinka.
Simona Halep lost her chance to go on a court she likened to "a very nice hotel" after she checked out of Wimbledon early following a shock 5-7, 6-4, 6-3 defeat by 106th-ranked Slovakian Jana Cepelova.
The 27-year-old Romanian beat Sloane Stephens at Roland Garros to win her maiden Grand Slam title in June and will have spent 40 weeks at the top of the rankings by the end of the season.
Juan Martin del Potro's summer renaissance continued on Monday as the unseeded Argentine advanced into the US Open quarter-finals when Austrian eighth seed Dominic Thiem quit their match with an injury.
World number one Rafael Nadal produced a ruthless performance to win his 75th singles title, beating Australian Nick Kyrgios 6-2, 6-1 in the China Open final on Sunday.
Romanian fifth seed Simona Halep advanced to the third round of the U.S. Open with a 6-3 6-4 win over Lucie Safarova on Thursday in the first full match played under a closed roof at Arthur Ashe Stadium. The $150 million retractable roof was installed ahead of this year's tournament and guaranteed there would be at least some action on a muggy and overcast Day Four at the year's final grand slam.
However, the 30-year-old Russia belied her own self-doubt with an impressive three-set win over the Romanian to thrust the former world number one back into the spotlight as the toast of the Big Apple.
IMAGES from Day 6 at Wimbledon on Saturday.
orld No 2 Simona Halep is to have an operation on her nose after an illness-plagued start to the year which ended with a first-round exit from the Australian Open.