Fifth seed Maria Sharapova averted an early exit on a sweltering day in Flushing Meadows. Updates from Wednesday's play.
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.
Sharapova's quarter-final defeat by Williams at the 2016 Australian Open was the last competitive match the Russian played for 15 months after she received a doping ban while American Williams was on a maternity break for most of 2017.
Big-stage experience proved the deciding factor for Dominika Cibulkova on Wednesday as she marched into her second grand slam semi-final with an impressive 6-3, 6-0 demolition of Simona Halep at the Australian Open.
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.
Serena Williams faces her first seeded opponent at the French Open on Thursday and will hope to use her booming serve to beat Australian Ashleigh Barty in the second round.
Former world number one Serena Williams returns to Grand Slam action for the first time in over 15 months, when she goes up against Czech Kristyna Pliskova in the French Open first round.
Simona Halep will take over as the new number one in the WTA world rankings after progressing to the China Open final with a dominant 6-2 6-4 victory over Latvia's Jelena Ostapenko in Beijing on Saturday.
Newly crowned French Open champion Maria Sharapova took her Coupe Suzanne-Lenglen trophy to the Eiffel Tower on Sunday.
Factbox on Iga Swiatek, who defeated Sofia Kenin to win her maiden Grand Slam title at the French Open on Saturday.
Simona Halep is emerging as one of the few players on Tour.
Summary of sports events and persons who made news on Monday
'I think what Venus and her sister have given our sport is absolutely tremendous. The way they've elevated women's tennis is truly inspiring'
Earlier on Wednesday, Czech Karolina Pliskova was forced to withdraw from the tournament due to a viral illness.
Multiple media reports on Monday said the USTA would confirm the Grand Slam tournament would go ahead without fans despite New York City still recording hundreds of new COVID-19 cases every day.
Milos Raonic, the finalist at Wimbledon this year, and women's world number five Simona Halep of Romania have pulled out from next month's Rio Olympics due to fears over the Zika virus.
The Canadian's win sets up a semi-final clash with Del Potro on Saturday that will pit power against power.
The Czech world number 52 had beaten top-10 players Simona Halep and Johanna Konta on her way to the final
Former French Open champion Jelena Ostapenko is the latest player to withdraw from the US Open, organisers of the tennis Grand Slam confirmed on Monday.
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.
American tennis ace Venus Williams has entered the top ten of latest WTA ranking following her victory in the Zhuhai Masters in China.
Simona Halep and Stan Wawrinka beat the heat with straight-sets wins to reach the third round of a sweltering US Open on Thursday while American hope Jack Sock wilted under the punishing conditions, collapsing on court.
The sixth seed burnt the midnight oil in her all-Czech fourth round grudge match against Barbara Strycova, finally clinching a 6-7, 6-3, 6-2 victory at 1.35 a.m. local time on Tuesday morning.
In the men's singles draw five-time champion Novak Djokovic headlines the top half of the draw and shares a quarter with Russian No.5 seed and recent Halle finalist Andrey Rublev.
A summary of Tuesday's play at the French Open.
Simona Halep's powers of recovery will be put to the test on day eight of the Australian Open on Monday when the world number one meets Japan's Naomi Osaka in a tricky fourth round clash.
The 23-year-old Kazakh, whose previous best performance in a Grand Slam was reaching the quarter-final at the French Open last year, would like TO create history on the hallowed turf of the All England Lawn Tennis and Croquet Club.
Serena Williams withdrew before the start of her BNP Paribas Open.
Pablo Carreno Busta rallied from a set down to defeat Hubert Hurkacz 3-6, 6-3, 6-3 in Montreal to claim the biggest title of his career at the Canadian Masters on Sunday.
PHOTOS from day seven of the Wimbledon championships at the All England Lawn Tennis and Croquet Club in London on Monday
Still shaking off the rust from a 15-month doping ban and a string of nagging injuries, the 30-year-old Sharapova needed all her skill, determination and two hours and 44 minutes to snatch victory in front of a packed Arthur Ashe stadium.
Maria Sharapova had given warning that she was ready for a three hour French Open final - and she was true to her word, stopping the clock at three hours two minutes to lift the trophy.
This will be her first appearance at the tournament since she was ousted in the second round in 2017.
2014 Wimbledon finalist Eugenie eliminated in 1st round.
Coco Gauff became the first American to win a US Open singles title since Sloane Stephens in 2017.
Hubert Hurkacz battled back from a set and a break down to beat Casper Ruud 5-7 6-3 6-2 on Saturday and reach the Canadian Masters final.
Rafa Nadal returned from an injury layoff to beat Miomir Kecmanovic 6-1 7-6(4) on Wednesday
Maria Sharapova recovered from a second-set wobble to dispatch third seed Agnieszka Radwanska 6-1, 6-4 on Saturday and set up a Madrid Open final clash against rising talent Simona Halep.
Italian veteran Flavia Pennetta upset China's Australian Open champion Li Na on Friday to join Poland's Agnieszka Radwanska in the women's final of the BNP Paribas Open at Indian Wells.
Defending doubles gold medallists Roger Federer and Stanislas Wawrinka were stretched by Japanese pairing Kei Nishikoir and Go Saeda on Monday, with the Swiss only winning the thrilling match 6-7, 6-4, 6-4 as darkness fell.