Williams's publicist Kelly Bush Novak was responding to a report on website Deadspin that an officer from the US Anti-Doping Agency (USADA) had visited seeking to drug test Williams outside the allotted daily window.
Serena Williams beat Julia Vakulenko of Ukraine 7-5, 6-2 to reach the quarter-finals in Stuttgart.
Serena Williams' relaxed outlook on life spilled over even in defeat on Saturday when she appeared to be almost as happy that Angelique Kerber had won her first Grand Slam final as the German herself.
Tennis sensation Serena Williams flaunted her toned figure while on a holiday in Miami to celebrate her French Open win.
Serena Williams underlined the difference in class and power between her and the rest of the women's field with a 6-0, 6-4 demolition of fourth seed Agnieszka Radwanska on Thursday to reach her seventh Australian Open final.
Williams reached the final of the mixed team event earlier this year with American compatriot John Isner to kick off a superb season where she won the Australian and French Opens and Wimbledon to take her grand slam singles haul to 21.
American tennis player Serena Williams is all set to make her comeback at the Australian Open, organisers confirmed.
Serena Williams weathered an early challenge from Russian Vera Zvonareva before the former World No 2 crumbled to lose 7-5, 6-0 in the second round of the Australian Open on Thursday.
Serena Williams won her third title of the year by beating Russian Vera Zvonareva 6-4, 3-6, 6-3 in the Family Circle Cup final.
Serena Williams came away with a 6-3, 7-5 victory over Angelique Kerber in the first round of the US Open.
Serena's coach said it had been a winding road following the birth of her daughter in 2017 to the kind of peak performance that brought her US Open success in the past.
The fifth-seeded Ukrainian reached her second straight Grand Slam semi-final after also making the last four at Wimbledon in July.
Lindsay Davenport hailed Serena Williams for delivering a 'powerful message' that shows it is possible to 'pursue personal goals even when you're a mum'.
American Serena Williams barged her way into the second round at Wimbledon on Monday with a 6-1 7-5 victory over Portuguese qualifier Neuza Silva.
Images from Day 1 of the Australian Open in Melbourne on Monday.
'I don't know. It's tough to explain my emotion right now. Maybe tomorrow morning I can tell you something, but now it's amazing'
World number ones Novak Djokovic and Serena Williams will feel like they are working overtime on Friday when organisers cram all four semi-finals into a single session to try and ensure a rain-ravaged tournament ends on schedule.
Summary of sports events and persons who made news on Monday
Tennis ace Serena Williams has graced the cover of the Essence magazine's July 2013 'Body Issue' in a blue ombre swimsuit.
Serena and Olympia look glamorous in hot pink dresses from the legendary fashion house Balmain.
Andy Roddick and Serena Williams scored contrasting wins to enter the Australian Open quarterfinals.
With a 6-2, 6-1 3rd round win over Swedish Johanna Larsson at the US Open at Flushing Meadows on Saturday, Serena recorded her 307th Grand Slam victory and in doing so went past legendary Martina Novratilova to record the most wins in a major by a woman.
Serena Williams is playing at another level, says beaten Agnieszka Radwanska
Serena Williams is set to return to tennis at the Wimbledon warm-up event in Eastbourne starting on Saturday, after a year sidelined by illness and injury.
The imposter who did turn up got dragged into a two hour 11 minute tussle in which she failed to convert 11 of the 12 break points that fell her way.
Serena Williams' scored a ruthless 6-3, 6-1 win over Bethanie Mattek to advance to the quarter-finals of the Cincinnati Open
Serena Williams overcame a gritty challenge from unseeded Dutchwoman Kiki Bertens, winning 7-6(7), 6-4, to reach the French Open final, in Paris, on Friday. She will meet Garbine Muguruza, who reached her second Grand Slam final when she beat Australia's Samantha Stosur 6-2, 6-4 in the first semi-final at Roland Garros.
A stone-faced Sharapova was left to ponder a 6-1, 6-1 drubbing that proved once again Williams has all the answers when the pair meet on court.
Venus Williams will replace sister Serena, who suffered an ankle innjury, in the Fed Cup tie against Belgium.
Defending champion Serena Williams continued her march towards a sixth Wimbledon title with a straightforward 6-3, 6-2 second-round win over French teenager Caroline Garcia on Thursday.
Venus Williams secured her place in the semi-finals of the WTA Championships when she completed her round-robin matches with a comprehensive 5-7, 6-1, 6-0 win over her sister Serena on Thursday. It was the first time Serena had lost a set 6-0 since the 2007 Miami final, after which she recovered to defeat Justine Henin for the title.
Novak Djokovic and Serena Williams were named men's and women's world champions for 2015 by the International Tennis Federation.
The seven-times grand slam singles champion was ranked 139th in the world at the entry deadline for the US Open.
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.
American ace said Sania has a solid game for her age.
The ex-world number one is confident she can again become a dominating force on the WTA Tour.
Defending champion Serena Williams was knocked out of the Australian Open by Daniela Hantuchova
The powerful Serena Williams may be the 'best player' but World No 2 Victoria Azarenka insists that she is steadily closing the gap.
Serena Williams rallied to avoid a stunning upset and secure a 1-6, 6-3, 6-3 semi-final win over Czech qualifier Marie Bouzkova at the Rogers Cup on Saturday, setting up a title showdown with local teenager Bianca Andreescu.