The unseeded American stunned Wimbledon finalist in the second round of the Stanford Classic.
Serena Williams has withdrawn from next week's Stanford Classic due to a thumb injury, organisers said on Thursday.
Former Wimbledon runner-up Marion Bartoli beat seventh seed Caroline Wozniacki 7-6, 6-4 at the Stuttgart Grand Prix on Thursday to set up a quarter-final against world number three Elena Dementieva. World number one Dinara Safina also moved into the last eight with a comfortable 6-4, 6-2 win over Daniela Hantuchova of Slovakia and will now meet Poland's Agnieszka Radwanska.
World number one Justine Henin scored and easy win over Marion Bartoli while Amelie Mauresmo went through when her Russian semi-final opponent Nadia Petrova pulled out with injury.
Amelie Mauresmo battled over three sets to overcome fellow Frenchwoman Marion Bartoli in the semi-finals of the Strasbourg Open on Friday.
Russia's Vera Zvonareva beat Marion Bartoli of France 6-3, 6-0 in the quarter-finals of the Australian Open in Melbourne on Tuesday to reach her first Grand Slam semi-final. Bartoli made a bright start, opening up a 3-1 lead in the first set, but Zvonareva won the last 11 games in a row to seal a comprehensive victory in 68 minutes.
Belarussian Victoria Azarenka beat Marion Bartoli 6-3 6-1 in the women's final at the Brisbane International on Saturday to capture her first WTA singles title.
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.
Marion Bartoli overpowered Japan's Ai Sugiyama 6-3, 6-3 to move into the final of the Stanford Classic on Saturday. The sixth-seeded Frenchwoman will meet Canada's Aleksandra Wozniak, who advanced when top seed Serena Williams was forced to retire with a knee injury down 6-2, 3-1.
Marion Bartoli knocked holder Anna Chakvetadze out of the Stanford Classic 6-3, 6-4 in the quarter-finals.
Marion Bartoli had barely registered on the tennis scale before but that did not stop her from destroying Justine Henin's Wimbledon dream.
Hungarian teenager Agnes Szavay battled it out for over two hours to overcome Russian Elena Dementieva 6-3 1-6 7-5 and reach the Paris Open final on Saturday.
Justine Henin extended her unbeaten run to 28 matches with a 4-6, 6-2, 6-4 win over Russia's Svetlana Kuznetsova in the final of the Sydney International on Friday.
Former Wimbledon champion Marion Bartoli says there are big question marks about whether or not Naomi Osaka will play at the grasscourt championships this year after her withdrawal from the French Open, citing mental health issues.
Patty Schnyder defeated third seed Marion Bartoli of France while Daniela Hantuchova edged past Czech Nicole Vaidisova.
The Belgian has won all but four of the 13 tournaments she has entered this year and is now unbeaten in 20 matches -- her last loss coming against Marion Bartoli in July's Wimbledon semi-finals.
The Belgian world number one beat France's Tatiana Golovin 2-6, 6-2, 6-1 in the final of the Stuttgart Grand Prix to land her eighth title of the year.
Eighteen-year old Vania King stunned top seed Marion Bartoli 6-1, 7-5 in the Sunfeast Open first round.
Venus and Serena Williams served their way into the U.S. Open quarter-finals with impressive straight-sets victories Sunday, setting up a possible clash between the American sisters in the final four.
As she did two years ago when she came in at number 14, the imposing American made a mockery of a low seeding.
The 27-year-old American beat France's Marion Bartoli 6-4, 6-1 in the final.
Marion Bartoli stunned top seed Justine Henin to reach the Wimbledon final on Friday, beating the world number one 1-6 7-5 6-1.
Li Na, the first Chinese to reach the quarter-finals of a Grand Slam at Wimbledon last year, has pulled out of this year's event because of injury.
Sixth seeded Israeli Shahar Peer battled through a tough first match at the Eastbourne International on Tuesday against an injured but determined Elena Likhovtseva.
Greece's Eleni Daniilidou caused the biggest upset on the opening day of the Amelia Island championship when she cruised to a 6-0 6-4 victory over French 10th seed Marion Bartoli on Monday.
Maria Sharapova beat Marion Bartoli 6-1, 6-2 to book a place in the Los Angeles Open quarter-finals.
List of Wimbledon women's singles champions since 1922.
The Indian ace was beaten by the top seeded Swiss girl 6-7(7), 5-7 in the quarter-finals.
Maria Sharapova will take on Slovakia's Daniela Hantuchova, while Amelie Mauresmo will meet Australian Alicia Molik in the semi-finals.
Australian Open finalist Marcos Baghdatis lost to Nikolay Davydenko in the third round in Miami
The Swiss beat third seed Francesca Schiavone 6-1, 6-2 at the Qatar Open
Anastasia Myskina and Vera Zvonareva powered Russia to their first Fed Cup title by winning the decisive doubles against holders France on Sunday.
The world number 19 said her victory was reward for her father Walter.
The 22-year-old Uzbek knocked out top seed Marion Bartoli of France 6-4, 6-4 at the Tashkent Open.
Unseeded Russian Maria Kirilenko upset defending champion Tamarine Tanasugarn of Thailand to storm in to the final of the WTA Hyderabad Open.
Sania Mirza and Liezel Huber upset second seeds Wynn Prakusya and Angelique Widjaja to enter the semi-finals in the WTA Hyderabad Open.