The three-times Wimbledon champion will partner Taylor Dent for the United States at the Dec. 29-Jan. 5 event in Perth's Burswood Dome.
Osaka, the 2019 and 2021 Melbourne Park champion, has not played on the WTA Tour since the Pan Pacific Open in September, where she pulled out of her second-round match against Beatriz Haddad Maia in Tokyo due to illness.
Unseeded Venus Williams marched into the Family Circle Cup semi-finals by beating Spain's Anabel Medina Garrigues 6-4 7-5 on Friday.
The sisters are doing it for themselves but their styles could not be more different on and off court
Kim Clijsters won a dramatic semi-final battle of the Belgians against Justin Henin to reach the final of the Sony Ericsson Open on Thursday.
Venus Williams was bundled out of the Australian Open on Wednesday, beaten 2-6, 7-6, 7-5 by Li Na, who joins fellow-Chinese Zheng Jie in the semi-finals.
World No 1 Serena Williams and her sister Venus tried their hand at cricket with the Melbourne Renegades players on a hotel roof top on Thursday.
Who scored an ace in the style department? Who flopped?
Serena Williams expects her sister Venus to be back at Melbourne Park next year for a 17th crack at winning the Australian Open, the American world number one said.
Serena Williams clinched a record 23rd grand slam title at the Australian Open on Saturday but spent most of the immediate aftermath talking about her older sister Venus.
U.S. captain Billie Jean King called up the big guns for the tie against the Czech Republic.
The win makes her the oldest woman to reach the third round at the French Open since Billie-Jean King in 1982.
The French Open witnessed a stunning upset on its very first day as 18-year-old Anastasia Potapova outclassed Angelique Kerber 6-4, 6-2 in the first round match on Sunday.
Images from Day One of the Australian Open, in Melbourne, on Monday.
Serena Williams battered Anastasia Pavlyuchenkova 6-4, 6-4 in the quarter-finals at Wimbledon on Tuesday, seizing on moments of weakness from the Russian to ram home her advantage.
Revenge will again be in the air when the top seed meets Henin in a semi-final grudge rematch on Thursday.
It would be hard to bet against the Williams sisters meeting in their first Wimbledon final since 2009, but Angelique Kerber and Elena Vesnina won't just be making up the numbers in the last four on Thursday. While unseeded Vesnina has described her semi-final against world number one Serena Williams as a dream, she is playing inspired tennis, bringing the guile from two doubles slams to deliver baseline power and a deft touch at the net.
Wondering how the celebs got ready for their big OSCAR night? Namrata Thakker brings you some behind-the-scenes pictures.
Venus Williams rallied from the disappointment of losing a tight first set to blast her way past Caroline Garcia 6-7(3), 6-2, 6-3 and set up a WTA Finals title showdown against Caroline Wozniacki on Saturday.
Naomi Osaka's return a boost for women's tour, says Mouratoglou
Venus Williams' record-equalling fifth Olympic tennis medal was silver rather than gold as she and partner Rajeev Ram lost an all-American mixed doubles final to Bethanie Mattek-Sands and Jack Sock on Sunday .
Venus Williams produced a vintage display full of guts and determination to grind out a 7-5, 6-7(3), 7-5 victory over Jelena Ostapenko at the WTA Finals on Tuesday to set up a White Group decider for a semi-finals berth against Garbine Muguruza.
South Korean Chung Hyeon managed to hang around against Roger Federer a little longer this time around, but only just, as the Swiss maestro advanced to the semi-finals of the BNP Paribas Open 7-5, 6-1 on Thursday.
Breeze though the outfits that caught the maximum shutterbugs at the final Grand Slam of the year.
IMAGES from the matches played at the Miami Masters on Sunday
Serbia's Ana Ivanovic overcame a second set resistance to beat Belgium's Kirsten Flipkens on Friday and set up an Auckland Classic final against former World No 1 Venus Williams.
List of US Open women's singles champions, since 1912.
Jerome Barson, who was a passenger in a sedan that collided with the SUV that Venus Williams was driving, died 13 days after the accident.
IMAGES from the PNB Paribas Open played at Indian Wells in California on Monday
US Open has over the years seen an increase in celebrity attendance. Rediff.com takes a look at a few known names seen in the Flushing neighborhood of the Queens borough of New York.
With next week's Australian Open in mind, a weary Venus Williams has opted to skip the Hobart International while her American compatriot Sloane Stephens has pulled out of the Sydney International with a minor wrist injury.
Less than a month after her run to the Wimbledon final, where she lost to Spain's Garbine Muguruza, 37-year-old Williams again had to turn back time against a young challenger.
Top seeded Briton Andy Murray was knocked out of the Australian Open in the fourth round on Sunday, losing 7-5 5-7 6-2 6-4 to German world number 50 Mischa Zverev on Rod Laver Arena.
Former world number ones Venus Williams and Ana Ivanovic endured a humbling start to the season after the top two seeds were dumped out of the Auckland Classic in the first round by unheralded opponents.
IMAGES from the matches played at the Miami Open on Thursday
Claiming to have accessed WADA's database, Fancy Bears' hack team claimed to have leaked dozens of files allegedly relating to United States athletes on the internet.
Former Wimbledon champion Marion Bartoli just wants to enjoy herself and play big matches when she returns to competitive tennis in March after more than four years in retirement.
With speculation rife that Rio Olympics silver medallist Venus Williams was allegedly allowed to use prohibited substance under Therapeutic Use Exemptions (TUEs) clause, Indian tennis ace Sania Mirza on Friday rubbished reports suggesting that she has demanded the All India Tennis Association (AITA) to raise the matter with the appropriate authorities.
Ugo Humbert had 90 minutes to fill before his delayed Wimbledon match against Casper Ruud on Wednesday but it still wasn't enough to pack properly as he turned up at Number Two Court missing a vital piece of equipment - a tennis racket.
Former world number one Roger Federer retained his place at the top of the list of the world's highest paid tennis players for a 17th year despite not playing a match for nearly 14 months.
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