One of Maria Sharapova's biggest sponsors, Nike Inc., said it was suspending ties while the case is being investigated.
World number one Rafael Nadal begins his French Open title defence, on Monday, with a clash against Italy's Simone Bolelli on Court Philippe-Chatrier.
Russian Maria Sharapova ground down Carla Suarez Navarro 4-6, 7-5, 6-1 to win the Rome Masters final on Sunday, the 35th WTA Tour title of her career.
"I prayed hard. Prayers not to win but for strength. All glory to God," the World No 1 said.
Asked after the match how she was feeling about her early departure, Halep replied that she was 'used to it'.
The verdict in Maria Sharapova's appeal against a two-year doping ban will be announced by the Court of Arbitration for Sport (CAS) on Tuesday.
Women's tennis's biggest names still remaining at the US Open take centre stage on Sunday with Grand Slam winners Maria Sharapova, Venus Williams, Garbine Muguruza and Petra Kvitova all appearing on Arthur Ashe Stadium.
Following is a list of American Serena Williams' 22 grand slam singles titles as she equalled Steffi Graf's professional era record with victory at Wimbledon on Saturday
The Court of Arbitration for Sport will rule in the first week of October on five-times grand slam champion Maria Sharapova's appeal against a two-year tennis ban, the sports tribunal said on Tuesday. The 29-year-old Russian was banned by the International Tennis Federation (ITF) in June following a positive test for the banned drug meldonium during January's Australian Open.
Eugenie Bouchard pulled off her first win over Maria Sharapova with a 7-5, 2-6, 6-4 triumph in the Madrid Open on Monday in a thrilling contest full of tension after the Canadian had called the Russian a cheater following her doping ban.
Big names and young guns turn up the heat at US Open
The 30-year-old Russian, who has won five Grand Slams and is among the highest-paid athletes in the world, returned to action on Wednesday with a straight sets win over Roberta Vinci following her suspension for the use of banned substance meldonium.
Maria Sharapova says her Australian Open preparations have gone smoothly despite her lack of recent on-court action, all barring a mix-up at the Melbourne Park laundry over a pair of leopard print underwear.
Maria Sharapova has shrugged off Caroline Wozniacki's criticism of US Open organisers for giving the Russian centre court billing in her return to Grand Slam tennis after a doping ban.
Maria Sharapova says she is not looking too far ahead after returning from a doping suspension but concedes she is eager to be competing for the biggest titles in tennis again.
Following is a list of Serena Williams' 23 grand slam singles titles after the American surpassed Steffi Graf's professional era record with victory at the Australian Open on Saturday:
Women's Tennis Association Chief Executive Steve Simon has defended the wildcard entry awarded to former world number one Maria Sharapova.
'We really hope that Sharapova will still be allowed to take part in the Olympic Games.'
Former World No 1 Maria Sharapova is expected to face a disciplinary hearing over a drug violation in June.
Former American great Chris Evert has no issue with tournaments handing Maria Sharapova wildcard entries as the Russian former world number one makes her way back from a doping ban, she said on Wednesday.
Former world number one Maria Sharapova will compete at the Birmingham Classic grasscourt event in the lead-up to Wimbledon, Britain's Lawn Tennis Association (LTA) announced.
After rain led to the cancellation of all matches outside of the roof-covered Arthur Ashe Stadium on Tuesday, the tournament looks to make up for lost time with a busy schedule featuring 87 matches.
Five-times Grand Slam champion Maria Sharapova has criticised the International Tennis Federation (ITF) for not doing enough to make her aware that meldonium had been added to the list of banned substances last year.
The German fifth seed kicks off her campaign against compatriot Tatjana Maria on Tuesday, but could potentially face three former champions in Serena Williams, Garbine Muguruza and Maria Sharapova if she goes deep into the tournament.
The Kremlin's spokesman said on Wednesday that a failed drug test by Russian tennis star Maria Sharapova should not be "projected onto" the whole of Russian sport.
American Sofia Kenin counter-punched her way back from a set down against Garbine Muguruza to win her first Grand Slam title at the Australian Open with a 4-6, 6-2, 6-2 win in Melbourne on Saturday.
The 30-year-old Russian, who returned last month from a 15-month doping ban, said on her website she would play in the qualifying event staged the week before.
French Open champion Stanislas Wawrinka has moved up five places to number four in the official ATP world rankings released on Monday.
Maria Sharapova will not care less what reception she receives when she plays her first Australian Open match since completing a doping ban on Tuesday, according to three-times Melbourne winner Mats Wilander.
There was only a scattering of fans inside the stadium as Sharapova took to the court on Wednesday, but after getting into her stride she overpowered the 91st-ranked Diatchenko.
Maria Sharapova beat Ana Ivanovic in the final of the Brisbane International on Saturday in a display that bodes well for her chances at the Australian Open.
Top seed Simona Halep was pooled with grand slam winners Maria Sharapova and Flavia Pennetta in a formidable looking Red Group for the end-of-season WTA Finals on Friday.
World number one Andy Murray is against giving wild cards to players returning from doping bans but the 29-year-old understands why tournament organisers make an exception for "big names".
Rediff.com presents a selection of the day's best photographs.
Making her Grand Slam comeback in Paris following the birth of her daughter Alexis Olympia last September, Serena Williams will renew her fierce on-court rivalry with Maria Sharapova on Monday when they meet in a highly-anticipated fourth-round showdown at the French Open.
Russian tennis star Maria Sharapova was recently spotted showing off her curvaceous physique and all-year tan at the first anniversary celebration of her candy collection 'Sugarpova' in New York.
Coco Gauff, 18, is the youngest finalist at Roland Garros since Kim Clijsters in 2001.
"What I experienced, what I felt from her moving around in between my serving motion was not, I don't think, sportsmanlike, in my opinion," American Coco Vandeweghe claimed after her quarter-final loss
Serena Williams, the top-ranked player in women's tennis, said on Tuesday she was shocked to hear her friend and fellow tennis star Maria Sharapova had failed a drug test, but she commended Sharapova for showing courage in taking responsibility.
Serena Williams outplayed Maria Sharapova to claim the 2015 Australian Open championship in straight sets on Saturday.