'Even though she's still playing arguably her best tennis, you have to wonder at a certain point how long that can keep up.'
The absence of expectant mother Serena Williams and a failure by any of the other top women to produce the kind of dominance the American seven-times champion has consistently delivered makes this year's Wimbledon the most open in years.
For someone who is the defending champion at Melbourne Park, Stanislas Wawrinka is remarkably upbeat about the lack of focus falling upon him.
A summary of sports events and sports persons, who made news on Wednesday
Hopes that Serena Williams would end a 13-year boycott of the BNP Paribas Open at Indian Wells were dashed on Friday when the World No 1 said she would not be competing in the event "after careful consideration".
Fifth seed Juan Martin Del Potro, whose match was shunted back to the late evening by the disruptions, was the first major casualty of the men's draw when he lostto 62nd ranked Spaniard Roberto Bautista at the Australian Open.
Williams sisters Serena and Venus had been hoping to provide fans with the first all-Williams sisters clash at a Grand Slam since the 2009 Wimbledon final in the semi-finals.
Madison Brengle could conceivably be the new face of advertising campaigns Down Under that urge people to 'slip, slop, slap' during the scorching summer months to help Australians and New Zealanders to lower the risk of skin cancers.
Plotting a path to the Australian Open has never been trickier or more uncertain. Even the best players are baffled about the best way to prepare for their annual trek Down Under.
Defending champion Serena Williams is the top seed in the women's draw. The American will be looking to equal Steffi Graf's Open era record by sealing a 22nd Grand Slam triumph.
Wimbledon's new head groundsman said on Thursday he is "100 percent happy" with the grass courts despite a string of players tumbling out of the tournament through injury.
Milestones in the progress of Chinese women's tennis after Li Na, the first Asian to win Grand Slam singles titles, announced her retirement from the sport on Friday.
PHOTOS from day three of the Wimbledon championships at the All England Lawn Tennis and Croquet Club in London on Wednesday.
21-year-old Garbine Muguruza has already proved that she has the power and intelligence to reduce the all-conquering American to a nervous wreck when she subjected Serena Williams to a 6-2, 6-2 pummelling at last year's French Open.
A refreshed Roger Federer's clinical demolition of Jarkko Nieminen in his first match of 2014 suggested he could be a factor in the first major of the year.
World No 1 Serena Williams showed plenty of rust in her first competitive outing of the year ahead of the Australian Open, but battled through to defeat Andrea Petkovic in straight sets at the Brisbane International on Tuesday.
After all the shocks and spills of the opening week, top seed Serena Williams remained impregnable as she unleashed her full arsenal to move almost effortlessly into the last 16 at Wimbledon on Saturday. A crushing 6-2, 6-0 win over Japanese veteran Kimiko Date-Krumm offered a reminder that while her closest rivals in the women's game are often vulnerable to upsets, she is an immovable object at the top of the tree.
Serena Williams had been a vulnerable conqueror at this year's majors, living dangerously and dicing with defeat on numerous occasions as she tried to become only the fourth woman to complete the calendar Grand Slam.
The returning Scot also announced his withdrawal from next week's Rogers Cup in Toronto.
'The one match I would really like to watch would be Williams versus Djokovic.'
Fourth seed Rafael Nadal survived a few anxious moments before booking his place in the semi-finals of the BNP Paribas Open with a see-sawing 6-4, 6-3 victory over Japanese Kei Nishikori at Indian Wells in California on Friday.
Former World No 1 Ana Ivanovic was upset 7-5, 6-4 by 42nd-ranked Karolina Pliskova of the Czech Republic in the second round of the US Open on Thursday.
The Women's Tennis Association, which has turned to Asia to grow its sport, is unclear how the International Tennis Premier League is going to pan out. 'We are still learning about it, just as the world and the media is,' said Melissa Pines, Vice-President, Asia-Pacific, on the sidelines of its new announcement to bring the season-ending BNP Paribas WTA Championships to South East Asia for the first time this year.
The tension mounted and temperatures soared at the U.S. Open as top seed Novak Djokovic and Andy Murray set up a sensational quarter-final, and Serena Williams made a 2014 grand slam breakthrough.
Photos from the tennis matches played at Indian Wells on Tuesday
Maria Sharapova, Serena Williams and Andy Murray were the big names to win on Monday and advance to the quarter-final of the Wimbledon.
World No 1 Novak Djokovic and Serena Williams advanced safely to the next round of the US Open on Saturday but the women's draw saw yet another big upset as Wimbledon winner Petra Kvitova was sent packing by a 145th-ranked qualifier.
Photos from French Open matches played at the Roland Garros on Friday
Roger Federer returned from a month-long layoff with a 6-4, 6-4 second round victory over Roberto Bautista Agut on Tuesday at the Western and Southern Open in Cincinnati.
Konta first British woman in US Open last 16 since 1991
Roger Federer boasted of his fitness, Maria Sharapova felt a bit rusty and Andy Murray berated himself but all three eased into the second week of the Australian Open with third round victories at Melbourne Park on Saturday.
A summary of the matches from Day 9 at the French Open.