The 20-year-old Belgian won her fourth title at the Luxembourg Open in the past five years.
The Belgian top seeds remained on course to meet in the final of the Swisscom Challenge.
World number two Kim Clijsters has confirmed she will make her comeback from a two-month injury layoff at the French Open, the Belgian said on Monday.
Former world number one Kim Clijsters will play about 16 tournaments next year including all four Grand Slams, the 26-year-old Belgian said on Thursday.
Champion Kim Clijsters has pulled out of the US Open due to a stomach muscle injury. 'Two weeks of rehab was not enough to heal this injury,' said the Belgian said in a statement, released by the USTA on Friday.
Belgium's Kim Clijsters reached the US Open final on Saturday after defending champion Serena Williams was defaulted on the final point. Clijsters won the match 6-4 7-5, which ended in controversy when the American was called for a foot-fault on a second serve to go match point down. An angry Williams argued with the lineswoman who reported her for verbal abuse. She will meet Caroline Wozniacki of Denmark, who beat error-prone Belgian Yanina Wickmayer 6-3, 6-3.
Kim Clijsters is unlikely to defend her US Open title later this month because of a wrist injury.
The Belgian beat Wimbledon champion Venus Williams for her third Stanford Classic title.
The Belgian won 7-6, 6-3 to earn a meeting with Russian second seed Svetlana Kuznetsova in the semi-finals of the WTA event in Warsaw.
France's Marion Bartoli shrugged off a stomach bug to reach the Indian Wells WTA tournament's semi-finals with a 6-4, 7-6 victory over former world number one Ana Ivanovic on Wednesday.
Kim Clijsters, making her comeback on Monday after a two-year absence, has the same dream as when she was world number one -- to win Wimbledon.
"My body is already giving me a lot of problems," the 22-year-old Belgian said.
Serena Williams, who won the Australian and Wimbledon Grand Slam titles last year, was voted the WTA Tour 2009 Player of the Year for a second successive season, at a ceremony in Miami on Wednesday.
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.
The Wimbledon champion will begin his defence against the talented Richard Gasquet of France
The Indian will take on seventh seed Elena Dementieva in the first round at Wimbledon
Amelie Mauresmo pummeled Martina Hingis 6-2, 6-2 in the semi-final of the Qatar Open.
Kim Clijsters's final ride at the Australian Open gathered momentum on Thursday when she motored into the third round with a 6-3 6-0 win over Japan's Akiko Morigami.
A complete round-up of the morning session of play at the Australian Open.
Kim Clijsters was courage personified as the defending champion shook off a painful ankle injury and saved four match points to overhaul China's Li Na 4-6, 7-6, 6-4 and reach the quarter-finals of the Australian Open on Sunday.
The Indian ace dropped two places to be ranked 34th in the WTA rankings
Kim Clijsters pulverised Spain's Carla Suarez Navarro 6-1, 6-3 to reach the third round of the Australian Open on Thursday, before laughing off a joke about her "looking pregnant."
Kim Clijsters avoided following US Open champion Sam Stosur out of the Brisbane International tournament when she beat Iveta Benesova 6-3, 6-2 on Thursday to advance to the semi-finals.
Former World No 1 Kim Clijsters has confirmed that she will bring down the curtain on her second career at the end of this year's US Open, Belgian news agency Belga has reported.
The Belgian whipped Lindsay Davenport to reach the final of the Acura Classic. She meets Justine Henin-Hardenne.
Kim Clijsters will not have played a match in almost two months when she returns at the French Open but if anyone can make a big impression after a lengthy absence the Belgian can.
Kim Clijsters, the long-running success story on New York's Grand Slam stage, is as ruthless on court as she is supportive off it.
Kim Clijsters lost the first set but roared back to beat Germany's Kristina Barrois 4-6, 6-2, 6-0 in the second round of the Paris Open on Wednesday.
Kim Clijsters came through a major test of her early season form to reach the Sydney International final with a 4-6, 6-3, 7-6 victory over Alisa Kleybanova on Thursday.