Defending champion Naomi Osaka of Japan was upset 7-5, 6-4 by Belinda Bencic in the fourth round at the US Open on Monday as the Swiss reached the quarter-finals for the second time.
Paths to the final in the women's singles at the U.S. Open (prefix denotes seedings)
Key facts and records of American Serena Williams and Canada's Bianca Andreescu
Rafael Nadal celebrated his 1,000th tour level match with a come-from-behind victory over German veteran Philipp Kohlschreiber to reach the fourth round of the Miami Open.
Top seed Caroline Wozniacki and former World No 1 Venus Williams ensured Auckland Classic organisers' dream final remained on track with the duo both recording comfortable victories in their first round matches on Tuesday.
Serena Williams is chasing Australian Margaret Court's record 24 Grand Slam singles titles
On a day when top seed Sloane Stephens survived a scare before beating Ajla Tomljanovic 4-6, 6-4, 6-4, Sakkari showcased supreme court coverage skills throughout her almost two-hour match against Bertens.
Despite boasting 34 Grand Slam singles titles between them, Serena Williams and Roger Federer were forced to share the spotlight with a 15-year-old at the US Open on Tuesday as all three advanced to the second round.
The year's final grand slam began with an upset as 13th-seeded Frenchman Richard Gasquet was upended 6-2 6-2 6-3 by Britain's world number 84 Kyle Edmund at the U.S. Open on Monday. Gasquet, who has reached the last 16 at Flushing Meadows four times in his career, was outplayed throughout and his U.S. Open experience lasted just one hour, 41 minutes.
Venus Williams kept up with little sister Serena on Wednesday, beating 78th-ranked Timea Bacsinszky of Switzerland in straight sets to advance to the third round of the US Open.
A summary of Thursday's play at the US Open.
Twice winner Maria Sharapova and reigning champion Flavia Pennetta advanced to the third round of the BNP Paribas Open on Saturday, though in sharply contrasting fashion.
The Australian Open started with a bang and the stars weren't hard to miss, as most of them were seen wearing loud colours at Melbourne Park.
Images from Day 4 of the Australian Open in Melbourne on Thursday
Images from Day 4 of the US Open in New York on Thursday.
Images from Day 6 of the US Open in New York, on Saturday.
Images from the second day at the US Open, the final Grand Slam tournament of the year.
Serena Williams recovered from a set down to beat Australian Ashleigh Barty 3-6, 6-3, 6-4 and book a place in the third round.
Images from the Australian Open matches played on Tuesday.
World No 1 Novak Djokovic and Serena Williams advanced safely to the next round of the US Open on Saturday but the women's draw saw yet another big upset as Wimbledon winner Petra Kvitova was sent packing by a 145th-ranked qualifier.
Images from Day 3 of the French Open matches played at Roland Garros in Paris on Tuesday
IMAGES from matches played on Day 4 of the French Open at Roland Garros on Wednesday
Images from Day 3 of the French Open in Paris on Tuesday
The Danish World No 3 ended 2017 with the biggest title of her career in Singapore and returned a day after thrashing Madison Brengle in her season opener to hit 21 winners against eight unforced errors in the 53-minute win over Martic.
India's Leander Paes and his German partner Alexander Zverev went down to the Spanish duo of Feliciano Lopez and Marc Lopez in a men's doubles first round match to bow out of the Cincinnati Open.