Poland's Agnieszka Radwanska moved within one win of securing a place at the WTA Finals after thrashing Czech Karolina Pliskova 6-3, 6-1 in the semi-finals of the Tianjin Open on Saturday.
Roger Federer is one win from becoming the oldest world number one in ATP Tour history after beating Philipp Kohlschreiber 7-6(8), 7-5 in the last 16 of the Rotterdam Open on Thursday.
Here is a list of US Open women's singles champions since the open era began in 1968:
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.
Barbora Strycova beat Alize Cornet 6-2, 7-6(4) to put defending champions Czech Republic level at 2-2 against hosts France and send the Fed Cup final into a doubles decider on Sunday.
Wellness expert Roopashree Sharma answers your health queries.
Adriana Lima, Sofia Vergara, Karolina Kurkova...Here's a look at who wore what at the annual CFDA Fashion Awards last night!
Venus Williams also went the distance before claiming a 2-6, 6-3, 6-3 victory over Croatia's Donna Vekic.
Six-time champion M C Mary Kom made sure of an unprecedented eighth medal at the women's World Boxing Championships after advancing to the semi-finals of the 51kg category, in Ulan-Ude, Russia, on Thursday.
Nadal avenged his defeat to the 20-year-old Greek at the same stage of the Madrid Open a week ago
Is that your jaw on the floor?
Serena Williams sounded a warning for her fellow Australian Open contenders with a sleek win
Rafael Nadal beat Alexandr Dolgopolov 6-3 6-3 in the Brisbane International first round on Tuesday to make a successful return to action following two-and-a-half months out due to injury. The Spanish former world number one, seeded fifth, made a sluggish start and fell 3-1 down in the first set against his Ukrainian opponent. But Nadal, 30, won four successive games to clinch the opening set and the 14-times grand slam winner broke twice in the second to see off 2012 Brisbane finalist Dolgopolov in one hour 15 minutes. He will next play Germany's Mischa Zverev.
Venus Williams has pulled out of the upcoming Brisbane International after suffering a 'setback' in training
Images from Day 4 of the French Open, at Roland Garros, in Paris.
Three women in the field have topped the world rankings this season, incumbent Simona Halep and her predecessors Garbine Muguruza and Karolina Pliskova, but none of them have been able to kick on and cement their place as the tour's dominant player.
Wawrinka splits with long-time coach Norman
The Serbian had to save two set points in the first set before finding his groove to reach his 10th title clash in Rome and remain on course to win his 36th ATP Masters 1000 crown and overtake Rafael Nadal on the all-time list.
Stefanos Tsitsipas' YouTube channel is experiencing a surge in subscribers after he reached the Australian Open semi-finals and the Greek youngster will hope to add to his highlight reel when he faces world number two Rafael Nadal on Thursday.
Novak Djokovic is aware of Kei Nishikori's battling qualities having lost twice to the Japanese in 17 career meetings.
The tournament, with eight players in both the men's and women's draw, will resemble regular tennis as much as possible.
Caroline Wozniacki overcame a mid-match wobble and withstood a barrage of big hitting to get her WTA Finals title defence back on track with a 7-5, 3-6, 6-2 victory over Petra Kvitova at the Singapore Indoor Stadium.
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.
Elina Svitolina stayed calm in the face of adversity to secure a surprise 6-3 7-5 win over German world number one Angelique Kerber as the Ukrainian advanced to the China Open quarter-finals in Beijing on Thursday.
Images from Day 2 at the US Open played at Flushing Meadows in New York on Tuesday
Singapore Slammers beat Indian Aces 27-21 in what turned out to be a dress rehearsal for the final of the International Premier Tennis League (IPTL), which the two teams will be vying for $1 million prize money.
Spain's Rafael Nadal was at his dominant best against Pablo Carreno Busta on Saturday, brushing aside his compatriot 6-1, 6-2, 6-4 to move into the fourth round at the Australian Open. Images from Day 6 of the Australian Open at Melbourne Park on Saturday.
M C Mary Kom stormed into the quarter-finals of the women's boxing flyweight category (51 kg) at the Olympics, scoring a comfortable 19-14 victory over Poland's Karolina Michalczuk at the ExCel Arena on Sunday.
Images from all the action on Day 9 at the Australian Open in Melbourne on Wednesday
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.
World number one Angelique Kerber got the birthday gift she wanted Wednesday by making the Australian Open third round, but she had to work hard against fellow German Carina Witthoeft.
Form guide for American Serena Williams ahead of Thursday's US Open semi-final clash against Latvia's Anastasija Sevastova:
Briton Andy Murray and Germany's Angelique Kerber were named ITF World Champions on Tuesday, capping stellar years for the men's and women's world number ones. Murray, whose brother Jamie was named doubles World Champion along with Brazil's Bruno Soares, won Wimbledon in July before becoming the first player to win two Olympic singles gold medals when he retained his crown in Rio de Janeiro in August.
World No 1s Andy Murray and Angelique Kerber have been named top seeds for the first major of the season, Australian Open, which will commences on January 16.
Key facts and records of American Serena Williams and Canada's Bianca Andreescu
'I knew I was the underdog and I was just enjoying it'
In an exciting back-and-forth rubber lasting three hours 45 minutes, Siniakova held off the 19-year-old Fed Cup debutante to give the Czechs a 3-0 win in the final against a United States team who were the defending champions but were missing their top players.
It will be the second consecutive final for Paes and Angel, who also reached the final at Montrrey Challenger last week, ending runners-up to Jeevan Nedunchezhiyan and Marcelo Arevalo.
Images from Day 8 of the Australian Open in Melbourne on Monday.