Venus Williams will replace sister Serena, who suffered an ankle innjury, in the Fed Cup tie against Belgium.
Serena Williams blew away fellow former number one Maria Sharapova 6-1, 6-3 to join top seed Victoria Azarenka in the semi-finals at the Madrid Open on Friday.
Serena Williams overcame a lethargic start to upset fellow former World No 1 Caroline Wozniacki at the Madrid Open on Thursday and set up a quarter-final meeting with old foe Maria Sharapova.
The former world number one, who returned to competition in June after 11 months out with injuries and health problems, will carry a 10-match winning streak into the final against Samantha Stosur and appears in ominous form ahead of the US Open starting Aug. 29.
The newly-crowned Australian Open champion will play at the Bangalore Open, from February 12-18.
"She played some incredible points on match point, she reminded me a bit of myself," said Williams after the match.
Serena Williams remains on course for a record sixth win at the Sony Ericsson Open after beating sister Venus 6-4, 3-6, 6-3 to set up a final meeting with 19-year-old Belarusian Victoria Azarenka. Azarenka defeated Russian Svetlana Kuznetsova 6-3, 2-6, 7-5 in Thursday's other semi-final to book her place in a top tier final for the first time.
American ace said Sania has a solid game for her age.
Serena Williams is intent on defending her Olympic titles in Rio and finds it sad that several athletes will miss out on an 'amazing' experience because of worries about the Zika virus.
Serena Williams faces the player she will replace next week as world number one, Victoria Azarenka, in the final of the Qatar Open after overcoming Maria Sharapova 6-3, 6-2 in Doha on Saturday
The real Serena Williams finally turned up at the French Open on Saturday in pursuit of a 22nd Grand Slam singles title but it was to no avail as she lost to a tenacious opponent who beat her at her own power game.
Bumble began in 2014 as a dating platform for women to start discussions with potential male partners. The company is aiming to promote newer functions, Bumble BFF and Bumble Bizz, which help women find friends and build business networks, alongside dating.
Serena Williams has been vulnerable this Grand Slam season but unbeaten in the year's first three major championships.
Serena Williams and Andy Murray had brief hiccups on the way to convincing victories at the US Open, each choosing different tactics to remain on track for a long ride into the year's final Grand Slam.
Russian Anastasia Myskina scraped past Israeli teenager Shahar Peer 6-2, 3-6, 6-3 to reach the third round of the Amelia Island Championship.
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.
The veteran American set up a showdown with Romanian former world number one Simona Halep in Saturday's final.
Serena beat Meghann Shaughnessy while Sharapova beat Dinara Safina to move into the Los Angeles Open semi-finals.
Australian great Margaret Court won 24 grand slam singles titles, one ahead of American Williams, who confirmed she was pregnant on Wednesday and will sit out the rest of the season.
Serena Williams, unable to defend her 2009 and 2010 titles last year due to a freak foot injury, found herself dive-bombed by crickets that made merry on a balmy evening at Rod Laver Arena.
Mauresmo overcame Paola Suarez while Serena thrashed Jennifer Capriati in the women's quarter-finals at Wimbledon.
Sharapova beat Lindsay Davenport while the defending champion beat Amelie Mauresmo in the women's singles semi-finals at Wimbledon.
2004 champion Justine Henin-Hardenne of Belgium beat Hana Sromova 7-6, 6-1 to confirm her position as tournament favourite.
Williams's last Grand Slam victory came 18 months ago at Wimbledon, and her form and fitness since returning to the tour after an eight-month layoff have been inconsistent.
Dinara Safina made a scrappy start to her Beijing duel with Serena Williams for the world number one spot by beating Italian Roberta Vinci 6-4, 6-4 in the first round of the $6.6 million China Open on Sunday.
World No 1 Serena Williams overcame a wobbly start to open the defence of her Sony Open crown with a spirited 7-6(9-7), 6-2 win over Kazakhstan's Yaroslava Shvedova on Thursday.
"I'm drama, and I don't want to be drama," Williams said after reaching the fourth round with a ill-tempered 4-6 6-3 6-4 win over Maria Jose Martinez Sanchez.
With a heavy rain expected to hit Flushing Meadows later in the day, Serb Jankovic relied on her trademark dogged retrieving to beat Russian Elena Dementieva 6-4, 6-4 before the muscular Williams swept away Dinara Safina 6-3, 6-2 in the women's singles semi-finals at the US Open.
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.
World No. 1 Serena Williams has been top-seeded for the U.S. Open where she will be seeking to win the women's singles title for a third consecutive year, the United States Tennis Association announced on Wednesday.
Five times Cincinnati winner Roger Federer blunted Andy Murray's attempt at a comeback, while women's World No 1 Serena Williams roared to victory as they moved into the semi-finals at the Western & Southern Open on Friday.
Australia's Samantha Stosur employed a huge serve, hard forehand and deft backhand slice to upset Wimbledon champion Serena Williams 6-2, 3-6, 6-2 in the quarter-finals of the Stanford Classic on Friday.
Coco Gauff claimed the biggest win of her young career on Friday with a stunning upset of defending champion Naomi Osaka at the Australian Open to reach the fourth round. Caroline Wozniacki and Serena Williams also lost their respective matches earlier in the day. Images from Day 5 of the Australian Open played at Melbourne Park on Friday.
Williams, dubbed the Australian Open favourite by Bouchard shortly after the match, is vying for a record-equalling 24th Grand Slam singles title
Halep finds groove to reach Prague semi-finals.
The glittering evening attracted royalty as well as movie stars, entertainers and a worldwide television audience estimated at 320 million.