Belgium will meet the United States in the Fed Cup semi-finals after Kim Clijsters and Justine Henin-Hardenne beat holders Russia
This year's WTA championships pays the winner $1 million, equalling the largest prize in women's sport.
Maria Sharapova retired during her Pan Pacific Open semi-final against Ana Ivanovic due to a hamstring injury.
List of US Open women's singles champions, since 1912.
After losing a 38-stroke exchange midway through the second set, Myskina responded by cracking her racket.
The Russian overcame a groin injury to reach her first Kremlin Cup final beating Czech teenager Nicole Vaidisova.
Top seed Amelie Mauresmo joined Russian trio Elena Dementieva, Nadia Petrova and Anna Chakvetadze in the Kremlin Cup quarter-finals on Thursday.
French Open finalist Elena Dementieva says she rarely talks to fellow Russian Maria Sharapova because "we don't have anything in common".
That was the only match completed before rain wiped out the rest of Tuesday's action at the US Open.
Sixth seeded Svetlana Kuznetsova was beaten by Serbian 19th seed Jelena Jankovic in the fourth round of the US Open.
The Parisian crowd has adopted the 22-year-old Russian as one of theirs.
The duo's feat of setting up the first all-Russian Grand Slam final at the French Open was hailed as a great victory for all of Russian sport.
A fatigued Sharapova lost to fellow-Russian Elena Dementieva while Williams was beaten Serbian Jelena Jankovic in the semi-finals of the Los Angeles Open.
Maria Sharapova's hopes of a second successive WTA Tour title ended when she was shocked by fellow Russian Elena Dementieva in the Los Angeles Open semi-finals.
Second seed Maria Sharapova crushed defending champion Mary Pierce 6-2 6-3, setting up a last four clash with Patty Schnyder of Switzerland, who beat number four Elena Dementieva 6-4 6-3.
The Russian will meet Patty Schnyder, who beat number four Elena Dementieva, in the semi-finals of the Acura Classic.
However, the Indian ace and her partner South African Liezel Huber, entered the doubles quarter-finals of the Acura Classic.
The Indian ace beat Katarina Srebotnik 6-3, 7-6 to set up a third round clash with Elena Dementieva.
A shoulder injury forced her to withdraw from a semi-final with Justine Henin-Hardenne.
Justine Henin-Hardenne battled her way to a 6-7, 6-4, 6-3 victory over Russia's Nadia Petrova to leave the countries level at 1-1 in Fed Cup
The third seed best her fellow Russian 6-1, 6-2 to win her first Pacific Life Open.
Dementieva will face third seed Maria Sharapova, who beat Martina Hingis, in the final of the Pacific Life Open.
The Belgian will face Elena Dementieva while the Swiss ace will take on Paradorn Srichaphan in ther semi-finals of the Pacific Life Open.
The Indian ace frittered away the advantage of winning the first set and lost to the fourth seed at the Pacific Life Open.
The Indian ace fought off a strong challenge from qualifier Bethanie Mattek at the Pacific Life Open.
Svetlana Kuznetsova overcame a dogged Shinobu Asagoe 6-1, 5-7, 7-5 on Sunday.
Former world number one Lindsay Davenport won her eighth consecutive match on the comeback trail by beating Russian Elena Dementieva 7-6, 6-1 to reach the semi-finals of the China Open on Friday
Jennifer Capriati and Elena Dementieva claimed semi-final spots at the U.S. Open after a day of drama, controversy and magical tennis.
"There was a misunderstanding with the translation because I didn't say that I'm not going to play at all," said Myskina.