Andrea Petkovic pulled off another upset at the Sony Ericsson Open on Tuesday, defeating sixth seed Jelena Jankovic to reach the semi-finals, while Kim Clijsters needed all her big-match experience just to stay in the tournament.
Kim Clijsters captured her third US Open singles title after thrashing Russia's Vera Zvonareva 6-2, 6-1 in Saturday's final.
The world number two suffered a surprise defeat by the Russian in the last 16 of the Italian Open.
Belarussian Victoria Azarenka produced some sparkling tennis to defeat an out-of-sorts world number two Kim Clijsters in the quarter-finals of the Sony Ericsson Open on Wednesday.
Clijsters and Xavier Malisse gave Belgium a 2-0 winning lead over Slovakia in the Hopman Cup.
The Belgian will take on Germany's Anna-Lena Groenefeld in the final of the Luxembourg Open.
Defending champion Patty Schnyder also reached the last eight by upsetting third seed Amelie Mauresmo 6-2, 6-2.
World No 19 Nadia Petrova smashed US Open champion Kim Clijsters out of the Australian Open third round on Friday, thrashing the Belgian 6-0, 6-1.
Some words of consolation from US Open champion Kim Clijsters made the bitter pill of a second successive Grand Slam final defeat easier to swallow for Vera Zvonareva.
The Russian ace beat top seed Kim Clijsters 7-5, 7-5 to win the Acura Classic.
Kim Clijsters raced into the quarter-finals of the Montreal Cup with a ruthless 6-2, 6-1 demolition of Kaia Kanepi on Thursday, sending a menacing message to anyone eyeing the Belgian's US Open crown.
Top seed Kim Clijsters beat Patty Schnyder 6-4, 6-2 in Sunday's final.
Kim Clijsters beat Francesca Schiavone of Italy 6-4, 6-4 in the Warsaw Cup quarterfinals
It took Kim Clijsters a few minutes to familiarise herself again with the layout at Wimbledon after a four-year absence. Once on court though, the returning Belgian wasted little time in swatting aside Italian Maria Elena Camerin 6-0, 6-3 to ease into the second round on Monday.
World number two Kim Clijsters has withdrawn from Wimbledon due to a foot injury, the tournament said in a statement on Wednesday.
The victory earned the Belgian a quarter-final meeting with Russia's Dinara Safina at the Diamond Games.
Kim Clijsters has pulled out of next month's Indian Wells WTA tournament in California because of an injured left ankle, the Belgian former World No 1 said on Tuesday.
Defending champion Maria Sharapova was forced to drop a set before beating Patty Schnyder in the season-ending WTA Championships.
Kim Clijsters captured the Rogers Cup with a 7-5, 6-1 victory over fellow Belgian Justine Henin-Hardenne.
Clijsters also said she considered Serena Williams and her sister Venus Williams as among her best friends.
Clijsters was forced to retire from her third-round match against Patty Schnyder after sliding awkwardly into the net
The former world number one ruled herself out of next month's Australian Open because of a wrist injury.
The second seed beat Paraguayan Rossana Neffa-De in 32 minutes in the first round at Wimbledon
The victory earned the Belgian a place in the final of the German Open.
Jelena Jankovic had to fight her way into the fourth round of the Indian Wells WTA tournament on Monday while former world number one Kim Clijsters was upset by Russian Alisa Kleybanova. Serbian sixth seed Jankovic beat Italian Sara Errani 2-6, 7-6, 6-4 in an error-strewn marathon on the stadium court before twice champion Clijsters of Belgium tumbled out 6-4, 1-6, 7-6.
A lingering shoulder problem has given world number two Kim Clijsters increased cause for concern with the WTA Tour's claycourt season fast approaching.
The second seed registered a convincing 6-0, 6-2 victory over Russian Olga Poutchkova at the Diamond Games.
Belgian Kim Clijsters crowned her remarkable comeback by beating 19-year-old Caroline Wozniacki of Denmark 7-5, 6-3 to win the US Open women's title on Sunday.