The 43-year-old American, contesting the Wimbledon singles for a record 24th time, still retains the easy power that once made her the queen of Centre Court but succumbed 6-4, 6-3 after a nasty early fall hindered her movement.
Serena Williams has clinched the year-end women's World No 1 ranking for the third time in her career after winning two Grand Slam titles during an excellent 2013.
Rafael Nadal thumped Canada's Milos Raonic while to capture his eighth ATP title this season while Serena Williams crushed Romania's Sorana Cirstea in the final of the Rogers Cup on Sunday.
Third-seeded Serb Jelena Jankovic beat the defending champion in straighht sets in the quarter-finals of the Australian Open.
Serena Williams is already assured a place in tennis history but her coach believes the 16-time Grand Slam champion will soon embroider her status among the greats.
Miami is one of the favourite stops on the WTA Tour because of the city's hip, youthful vibe but the final of Sony Open on Saturday was more about the golden oldies as Serena Williams and Li Na took centre stage.
Novak Djokovic and Serena Williams were named men's and women's world champions for 2015 by the International Tennis Federation on Tuesday. The Serb ended the year as men's world number one for the fourth time after taking three majors - the Australian, Wimbledon and US Open, as well as finishing runner-up to Stan Wawrinka in the French. Williams also narrowly missed a calendar-year grand slam, winning the Australian, French and Wimbledon and reaching semi-final at US Open.
Maria Sharapova will face Serena Williams in the final of the Sony Open while Britain's Andy Murray will take on France's Richard Gasquet in the men's semi-finals after grinding down Croatian Marin Cilic.
Second seed Serena Williams recovered from match point down to beat Russian fourth seed Elena Dementieva 6-7, 7-5, 8-6 in a nailbiting semi-final at Wimbledon on Thursday.
World No 1 Serena Williams overcame a dreadful second set to beat Germany's Sabine Lisicki.
World No 2 Serena Williams shook out any cobwebs from four months away from tennis with a 6-3, 6-4 victory over France's Pauline Parmentier in the first round of the Auckland Classic on Tuesday.
Serena Williams was in no mood to allow a painful tumble to divert her from her path to a sixth Australian Open title on Tuesday and duly delivered a resounding 6-0, 6-0 win to open her campaign at the year's first Grand Slam.
Serena Williams can break Margaret Court's record of 24 Grand Slam singles despite being five short at an age when most players have retired, according to Martina Navratilova.
Serbia's Novak Djokovic has beaten Andy Murray to the International Tennis Federation's (ITF) annual men's World Champion award with American Serena Williams taking the women's prize for a third time.
The mercury was rising at Wimbledon on Saturday as the serial trophy hunters gathered in the last 16 with defending champions Rafa Nadal, Serena Williams and Roger Federer leading the charge.
The victory gave the world No.1 a place in the final of the \n\nFamily Circle Cup, against Justine Henin-Hardenne.\n\n
Leonardo DiCaprio and David Schwimmer were the high-profile celebrities at the US Open on Tuesday.
?Andy Murray's preparations for this month's Australian Open suffered a setback on Wednesday when the world number two went down in straight sets to local favourite Nick Kyrgios at the Hopman Cup in Perth.
Serena Williams proved an irresistible force once more as she powered past Maria Sharapova 6-4, 6-4 to win the French Open for the second time on Saturday - 11 years after her first triumph.
Williams said the number 24 is becoming an obsession for the media who talk of little else
Ask Serena Williams about her dog, her stick-men self portraits or the quirky names she gives her multiple personalities and she will happily chew your ear off; mention her tennis and words are few and far between.
Serena Williams beat Slovenia's Katarina Srebotnik 4-6, 6-4, 6-3 to reach the Family Circle Cup quarter-finals. The fifth-seeded American won the last eight points to set up a clash with Russian number two seed Maria Sharapova, who defeated Ukrainian Tatiana Perebiynis 7-5, 6-2.
Ailing knees, Father Time and even a resurgent Victoria Azarenka stand in the way of Serena Williams clinching her seventh Australian Open title and giving her one more shot at an achievement that would cap her storied career.
Serena Williams breezed past Romanian Edina Gallovits 6-1, 6-2 while Justine Henin beat Angelique Kerber of Germany 6-4, 6-2.
Serena Williams has withdrawn from next week's Stanford Classic due to a thumb injury, organisers said on Thursday.
World number one Serena Williams has started her clay-court season in dominant style, beating Anna-Lena Friedsam in straight sets in the second round of the Italian Open in Rome on Tuesday.
Serena Williams rallied past Denmark's Caroline Wozniacki on Saturday to reach the Western and Southern Open final in Cincinnati where she will face Ana Ivanovic, an upset winner over French Open champion Maria Sharapova.
Serena Williams remains the 'queen' of women's tennis but don't be surprised if she's no longer No 1 by the end of the year, Martina Navratilova said Thursday.
Serena Williams' bid for a rare calendar-year Grand Slam came to a shuddering halt at the U.S. Open on Friday when the three-times defending champion suffered a stunning 2-6, 6-4, 6-4 loss to unseeded Italian Roberta Vinci.
World number one Serena Williams kept her Wimbledon title defence on track on Sunday, downing Germany's Annika Beck 6-3, 6-0 with a crushing display of power and booming serves to chalk up her 300th grand slam victory.
Serena Williams is "at the end of (her) rope" after several physical setbacks that have kept her off the court since July.
Serena Williams, the top-ranked player in women's tennis, said on Tuesday she was shocked to hear her friend and fellow tennis star Maria Sharapova had failed a drug test, but she commended Sharapova for showing courage in taking responsibility.
A battle-tested Serena Williams booked her spot in the semi-finals of the Toronto Cup on Friday after overcoming a sluggish start to grind out a 4-6, 6-3, 6-2 win over Czech Lucie Safarova.
British World No. 3 Andy Murray cruised to a straightforward victory over Bernard Tomic at the Sony Open but the Williams sisters had contrasting fortunes in Miami on Saturday.
Venus Williams said her sister Serena was a fighter and was determined to play on at the Australian Open, despite rolling her ankle in the first round, reports AFP.
Becker backed the idea of merging the ATP and the WTA and said the ongoing pause is an opportunity for the sport's stakeholders to work together.
Williams broke down in tears at her post-match news conference when asked about the behaviour of the Parisian crowd.
Justine Henin qualified for the WTA Championships semi-finals with a 6-2, 6-2 win over Jelena Jankovic.