The news comes after Sharapova, who said the decision to end their four-year partnership was "mutually agreed", was beaten by 44th-ranked Naomi Osaka in the first round of the BNP Paribas Open in California on Wednesday.
Swiss second seed Stan Wawrinka advanced into the semi-finals at the Rogers Cup with a comprehensive 6-1, 6-3 victory over big-serving South African Kevin Anderson at the Aviva Centre in Toronto on Friday.
World number one Novak Djokovic is on a French Open semi-final collision course with nine-times champion Rafael Nadal after the draw was made on Friday.
World number one Serena Williams has started her clay-court season in dominant style, beating Anna-Lena Friedsam in straight sets in the second round of the Italian Open in Rome on Tuesday.
Could French Open champion Jelena Ostapenko serve up another shock at Wimbledon this year? Or will world number one Angelique Kerber get her season back on track at Wimbledon?
Serena Williams remains the 'queen' of women's tennis but don't be surprised if she's no longer No 1 by the end of the year, Martina Navratilova said Thursday.
Petra Martic kept her composure to advance to the Round of 16
Czech Karolina Pliskova stopped upset-maker Varvara Lepchenko in the semi-finals at the Bank of The West Classic in Stanford, California, on Saturday.
Fourth seed Angelique Kerber's bid for consecutive Grand Slam titles ended when 29th seed Dominika Cibulkova defeated the German 3-6, 6-3, 6-3 in the US Open third round on Saturday.
Images from Sunday's action at the Australian Open, in Melbourne.
Nadal meets the 'new Nick' Kyrgios in fourth-round blockbuster
The world number 181 is the first mother since 1980 champion Evonne Goolagong to reach the Wimbledon final.
Seven-times champion Serena Williams and Germany's Angelique Kerber will clash in the Ladies singles final at Wimbledon after registering easy victories in the semi-finals on Thursday. While Serena had things her way in a 6-2, 6-4 demolition of Germany's Julia Georges, Kerber beat Latvia's Jelena Ostapenko 6-3, 6-3.
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:
Top seed Andy Murray could meet Roger Federer or Kei Nishikori in the third round, while Serena faces tricky Belinda Bencic in opening round
Angelique Kerber's build-up for next week's Australian Open suffered a setback with the German world number one going down in straight sets to Russian teenager Daria Kasatkina in the second round of the Sydney International.
Andy Murray overcame a slow start and a third set service break to beat Taro Daniel 1-6, 6-2, 6-4 in the first round of Indian Wells on Friday and notch his 700th career win.
Maria Sharapova is renowned for her sheer determination in the face of adversity but in Singapore on Saturday, the Russian was quick to cast doubt over her chances of winning the WTA Finals after an injury-ravaged second half of the season.
Summary of sports events and persons who made news on Sunday
Images from Day 1 of the French Open matches played at Roland Garros on Sunday
Rafael Nadal, with his troublesome left wrist improving every day, will be eyeing more progress at the US Open on Friday when he bids for a place in the last 16.
In the women's draw, Halep is seeded 2nd after top-ranked Kerber
Lucas Pouille crowned a glorious French charge at the U.S. Open on Sunday by ousting 14-times grand slam singles winner Rafa Nadal in a five-set thriller. The 22-year-old Pouille, seeded 24th, won a deciding tiebreak 8-6 to complete a 6-1 2-6 6-4 3-6 7-6(6) marathon victory and join compatriots Jo-Wilfried Tsonga and Gael Monfils into the last eight at Flushing Meadows.
An inspired Halep took full advantage of an error-strewn display by seven-time champion Williams to become the first Romanian to win the Wimbledon title.
In the women's draw, defending champion Garbine Muguruza will play 2010 French Open winner Francesca Schiavone
American tennis ace Venus Williams has entered the top ten of latest WTA ranking following her victory in the Zhuhai Masters in China.
Here are images from a hot, hot day from Melbourne Park...
Serena Williams returned to the top of the WTA world rankings on Monday and immediately shared the news with her unborn baby.
Vandeweghe's quest for maiden Slam title at Australian Open continues
American Serena Williams won her seventh Wimbledon singles crown, and equalled the professional era record of 22 grand slam titles, with a 7-5, 6-3 victory over Germany's Angelique Kerber on Saturday:
Rafael Nadal will have his work cut out when play begins next week, not on the Caja Magica's three red dust courts, but on gaming consoles.
Penpix of the top women's contenders at the 2017 French Open:
Following Serena Williams's win over Angelique Kerber for her 7th Wimbledon crown, here is a list of Wimbledon women's singles champions since 1922:
Venus Williams's bid for a 50th WTA title ended when she fell to Kazakhstan's Yulia Putintseva in the Round of 16 at the Volvo Car Open on Thursday, while Australian Open champion Angelique Kerber breezed into the last eight.
Images from Day 7 of the 2022 Australian Open at Melbourne Park on Sunday.
The list of players who have been defaulted from a tour-level match for on-field misconduct.
What happened on Day 3 of the French Open was more surprising. Two of the top five seeded women exited.
Angelique Kerber, who will reclaim the world number one ranking on Monday, breezed to a 6-2, 6-1 second-round victory over fellow German Andrea Petkovic at the BNP Paribas Open on Saturday.
Order of play on the main show courts at the French Open.
Tennis Grand Slam champions Serena, Osaka and Kerber are top 3 in the famed list