World number one Amelie Mauresmo lost 6-4, 7-5 to defending champion Lindsay Davenport in the New Haven quarter-finals.
Serena Williams breezed past Romanian Edina Gallovits 6-1, 6-2 while Justine Henin beat Angelique Kerber of Germany 6-4, 6-2.
The Belgian world number one beat Amelie Mauresmo to keep the Eastbourne International title.
World number one Justine Henin brushed aside Czech teenager Nicole Vaidisova to reach the semi-finals of the Eastbourne International.
The world number one is feeling calm and happy after a period of personal upheaval.
The Belgian dished out a painful 6-1 6-2 lesson to Serbian school student Ana Ivanovic to become the first woman since tennis turned professional in 1968 to win back-to-back Roland Garros crowns without dropping a set.
The world number one crushed Serbia's Ana Ivanovic 6-1, 6-2 in the women's final.
World number one Roger Federer, chasing the only Grand Slam title to elude him so far, faces gritty Spaniard Tommy Robredo.
Also making it to the last eight were Svetlana Kuznetsova and Czech teenager Nicole Vaidisova.
It was the eighth seed's first trophy since she won in Moscow in October while Kuznetsova suffered her second defeat in the final here, having also lost to Justine Henin in 2004.
Belgium's Fed Cup captain Carl Maes has urged Justine Henin-Hardenne to play in September's final against Italy after her coach cast doubt over her participation.
World number one Justine Henin recovered from an early scare to beat qualifier Timea Bacsinszky 2-6, 6-3, 6-3.
Wimbledon champion Amelie Mauresmo suffered a surprise loss to unseeded Ukrainian Julia Vakulenko at the German Open on Friday, as world number one Justine Henin moved smoothly into the quarter-finals.
Politics must be kept out of sport at this year's Olympics if the Beijing Games are to be a success, the world number one said.
Russian Maria Sharapova produced a blistering performance to overpower world number one Justine Henin 6-4 6-0 in the Australian Open quarter-finals on Tuesday.
Justine Henin and Maria Sharapova set up an explosive Australian Open quarter-final with crushing wins.
Hsieh Su-wei proudly flew the Taiwanese flag on Friday when she became the first player from her country to reach the last 16 of a Grand Slam tournament. The 22-year-old qualifier edged out France's Aravane Rezai 6-2, 6-7, 6-4 and now plays top seed and world number one Justine Henin of Belgium.
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.
World number one Justine Henin set up a dream final against second-ranked Svetlana Kuznetsova after beating Ana Ivanovic at the Sydney International on Thursday.
Justine Henin made a belated start to her build-up for next week's Australian Open by thumping Estonia's Kaia Kanepi 6-2, 6-0 at the Sydney International on Wednesday.
Justine Henin is likely to be favourite to win the Australian Open but Serena said she believes she could retain the trophy.
The Belgian beat Russia's Svetlana Kuznetsova 6-4, 6-2 to win the Qatar Open and complete a Gulf double.
Unseeded Safarova will take on Russian Nadia Petrova, who beat holder Amelie Mauresmo of France in the other semi-final.
World number one Justine Henin battled back from a set down to overcome Maria Sharapova 5-7, 7-5, 6-3 and retain her WTA Championships title in an epic struggle at the Madrid Arena on Sunday.
Justine Henin remained on course for a successful defence of her WTA Championships crown when she secured her place in the final with a spectacular win over Ana Ivanovic.
Maria Sharapova looked back to her best as she overwhelmed Ana Ivanovic 6-1, 6-2 in her final round-robin match at the WTA Championships to set up a semi-final showdown with Russian compatriot Anna Chakvetadze.
World number one Justine Henin-Hardenne is separating from her husband and plans to return to the women's tennis circuit.
Justine Henin qualified for the WTA Championships semi-finals with a 6-2, 6-2 win over Jelena Jankovic.
The world number one began the defence of her WTA Championships singles title with a 6-1, 7-6 win over Russian Anna Chakvetadze.
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.
World number one Justine Henin brushed aside Polish teenager Agnieszka Radwanska 6-4, 6-2 in the quarter-finals of the Zurich Open on Friday to maintain her incredible run this year.
Women's world number one Justine Henin shrugs off comparisons to male counterpart Roger Federer and says she is giving little thought to her place in sporting history.
Martina Hingis of Switzerland climbed 232 places to number 117 after reaching the quarter-finals of the Australian Open.
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.
The Belgian was joined by Svetlana Kuznetsova, Jelena Jankovic and Tatiana Golovin in the semi-finals of the Stuttgart Open.
World number one Justine Henin made a problem-free return to the court on Thursday, beating Dinara Safina 6-4, 6-1 in her first match since winning the US Open.
Martina Hingis has been drawn to play Justine Henin-Hardenne in the first round of the Sydney International.
The Belgian raced to victory in one hour, 22 minutes to become the first woman to win the title without losing a set since Serena Williams in 2002.
Top seed Justine Henin of Belgium battled past two-times champion Venus Williams while fourth Russian Svetlana Kuznetsova beat compatriot Anna Chakvetadze in the semi-finals.
A despondent Serena Williams grudgingly faced reporters after her 7-6 6-1 defeat to top seed Justine Henin in Tuesday's quarter-finals of the U.S. Open, tears staining her cheeks after the bitter result.