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With a heavy rain expected to hit Flushing Meadows later in the day, Serb Jankovic relied on her trademark dogged retrieving to beat Russian Elena Dementieva 6-4, 6-4 before the muscular Williams swept away Dinara Safina 6-3, 6-2 in the women's singles semi-finals at the US Open.
"I'm drama, and I don't want to be drama," Williams said after reaching the fourth round with a ill-tempered 4-6 6-3 6-4 win over Maria Jose Martinez Sanchez.
World No 1 Serena Williams overcame a wobbly start to open the defence of her Sony Open crown with a spirited 7-6(9-7), 6-2 win over Kazakhstan's Yaroslava Shvedova on Thursday.
World No 1 Serena Williams suffered one of the heaviest defeats of her long and illustrious career as she was humbled 6-0, 6-2 by Romanian Simona Halep at the WTA Finals on Wednesday.
Australia's Samantha Stosur employed a huge serve, hard forehand and deft backhand slice to upset Wimbledon champion Serena Williams 6-2, 3-6, 6-2 in the quarter-finals of the Stanford Classic on Friday.
The veteran American set up a showdown with Romanian former world number one Simona Halep in Saturday's final.
World No. 1 Serena Williams has been top-seeded for the U.S. Open where she will be seeking to win the women's singles title for a third consecutive year, the United States Tennis Association announced on Wednesday.
Five times Cincinnati winner Roger Federer blunted Andy Murray's attempt at a comeback, while women's World No 1 Serena Williams roared to victory as they moved into the semi-finals at the Western & Southern Open on Friday.
The glittering evening attracted royalty as well as movie stars, entertainers and a worldwide television audience estimated at 320 million.
Russian Sharapova pulled out because of a hamstring injury while Serena is still down with flu.
Serena Williams' bid for the Italian Open was squashed in her first match on Tuesday when the American second seed lost 6-2, 2-6, 6-1 to Swiss Patty Schnyder. French Open champion Ana Ivanovic beat Italian Francesca Schiavone 6-3, 6-4 and seventh seed Svetlana Kuznetsova of Russia had a comfortable 6-3, 6-3 win over Slovak Daniela Hantuchova.
The former world No 1 has her sights set on the upcoming Australian Open as her comeback platform, and she's already deep into training following what she playfully terms 'a cool little intermission'.
World number one Caroline Wozniacki might have been better off asking Serena Williams about how to win the biggest tournaments instead of seeking guidance about relationships.
A summary of Wednesday's action at the US Open on Day 3.
Serena Williams battered Anastasia Pavlyuchenkova 6-4, 6-4 in the quarter-finals at Wimbledon on Tuesday, seizing on moments of weakness from the Russian to ram home her advantage.
Women's No 1 Serena Williams remained on track for her 60th career title as she powered past Peng Shuai 6-2, 6-3 while Rafael Nadal launched the defence of his Madrid Open title.
Serena Williams, who has dropped to 172nd in the world after being sidelined for almost a year with injury and illness, has opted to use an injury-protected ranking to gain entry into the US Open, the United States Tennis Association (USTA) said on Wednesday.
The former world No.1 told organisers of the Perth event that she wants to concentrate on defending her title at the Australian Open.
Williams, dubbed the Australian Open favourite by Bouchard shortly after the match, is vying for a record-equalling 24th Grand Slam singles title
Coco Gauff claimed the biggest win of her young career on Friday with a stunning upset of defending champion Naomi Osaka at the Australian Open to reach the fourth round. Caroline Wozniacki and Serena Williams also lost their respective matches earlier in the day. Images from Day 5 of the Australian Open played at Melbourne Park on Friday.
World number one Serena Williams raced into the quarter-finals of the Paris Open with a 6-1, 6-2 demolition of Croatian qualifier Karolina Sprem on Thursday. The American top seed, who won the tournament in 1999 and 2003, will face France's Emilie Loit for a semi-final spot on Friday.
Venus and Serena Williams won the 2009 Australian Open women's doubles title, beating Slovakia's Daniela Hantuchova and Japan's Ai Sugiyama, 6-3, 6-3 in the final in Melbourne on Friday. The tenth-seeded American sisters captured their eighth Grand Slam doubles title in the process, having also won the Australian Open in 2001 and 2003.
Victory in Melbourne would be sure to put a smile on her face, though. It would give her the oft-mentioned 'Serena Slam'.
The top seed celebrated her 23rd birthday with a come-from-behind win over Russian Svetlana Kuznetsova in the final.
Petra Kvitova is not the type to talk herself up even if she does arrive at Wimbledon as the defending champion.
The thought of playing a long match in the extreme Melbourne heat resulted in a sleepless night for Serena Williams, but the World No 1 need not have worried as she strode swiftly into the Australian Open third round on Wednesday.
World number two Serena Williams retired from her first-round match against Francesca Schiavone at the Madrid Open Monday with a knee injury after losing the first set to the Italian.
Halep finds groove to reach Prague semi-finals.
Serena Williams summoned all her fighting qualities to beat Victoria Azarenka 4-6, 7-6, 6-2 at the Australian Open on Wednesday after sister Venus's exit. Li Na earlier stunned Venus to become just the second Chinese to reach the semi-finals of a Grand Slam.
Serena Williams takes centre stage on Centre Court when she lines up opposite 16-year-old Tatiana Golovin.
Venus and Serena Williams enter the women's Wimbledon quarter-finals on Tuesday with even their next opponents conceding they are strong favourites for another final appearance. Defending champion Venus faces Tamarine Tanasurgan and the unseeded Thai, who defeated second seed Jelena Jankovic to reach her first grand slam quarter-final, is not brimming with confidence.
Serena Williams returned to the top of the WTA world rankings on Monday and immediately shared the news with her unborn baby.
World number one Serena Williams survived a scare to beat China's Li Na 4-6, 7-6, 6-2 on Wednesday and reach the Sony Ericsson Open semi-finals -- where she will meet her sister Venus.
Serena Williams enters the Australian Open as a strong favourite to lift the Daphne Akhurst Memorial Cup but is all too aware that a sixth Melbourne Park title has now eluded her for five years.
Seventh-seeded Briton Tim Henman was a surprise loser, however, as he went out 7-6 2-6 7-6 to world number 64 Juergen Melzer at the Nasdaq-100 Open.
Clijsters completed her inexorable progress to Sunday's final with a 6-3, 6-2 win over Sugiyama.