Serena Williams is through to the semi-finals of the French Open after a straight sets win over Sara Errani. Photograph: Afp

For a while on Wednesday, Serena Williams seemed ageless – and almost unfairly too powerful for her opponent, as she beat the Italian Sara Errani 6-1,(...)

Stan Wawrinka  celebrates after defeating Kei Nishikori to progress to the semi-finals of the Australian Open. (Photograph: REUTERS/Carlos Barria)

Men’s champion Stan Wawrinka avenged a tough defeat to Kei Nishikori at last year’s U.S. Open while an ill Serena Williams remained on track for her (...)

Novak Djokovic stretches to hit a backhand return during his match against    Gilles Muller  at  the Australian Open in  Melbourne. Photograph:  Lukas Coch/EPA

Novak Djokovic ensured seven of the top eight seeds reached the quarter-finals of the Australian Open after overcoming Luxembourg’s Gilles Muller in M(...)

Caroline Wozniacki of Denmark makes a backhand return to Victoria Azarenka of Belarus during their second round match at the Australian Open tennis championship in Melbourne, Australia, Thursday. Photograph: Lee Jin-man/AP

Caroline Wozniacki said she felt “cursed” at Melbourne Park after losing in straight sets to a resurgent Victoria Azarenka in the Australian Open sec(...)

Serena Williams is through to the second round of the Australian Open after she beat Belgium’s Alison Van Uytvanck in straight sets. (Photograph: William WestGetty Images)

Serena Williams was dragged into a second set scrap by unheralded Belgian Alison Van Uytvanck but put down the minor threat with some powerful serving(...)

Serena Williams of the US  poses with the championship trophy after defeating Caroline Wozniacki of Denmark to win the women’s final match of the 2014 US Open Tennis Championship at Flushing Meadows, New York, USA, yesterday. Photograph: Justin Lane/EPA

They did the cool thing, the classy thing, by bringing Martina Navratilova and Chris Evert out to embellish, or even to authenticate, the occasion of(...)

Serena Williams  defeated Flavia Pennetta  to reach the US Open semi-final. Photograph:  Barton Silverman/The New York Times

Two-time defending champion Serena Williams, in her black and white leopard dress, started quietly before roaring past 11th seed Flavia Pennetta 6-3 6(...)

Ekaterina Makarova of Russia serves to Victoria Azarenka of Belarus during their US Open quarter-final match  in New York. Photograph: Mike Segar/Reuters

Russia’s Ekaterina Makarova reached the first Grand Slam singles semi-final of her career with victory over two-time US Open runner-up Victoria Azaren(...)

Serena Williams of the United States returns a shot against Vania King of the United States during their women’s singles second round match on Day Four of the 2014 US Open. Photograph:  Elsa/Getty Images

Serena Williams won 10 games in a row to defeat countrywoman Vania King and reach the third round of the US Open. The world number one, who is bidding(...)

Catherine Bellis of the United States reacts after defeating Dominika Cibulkova of Slovakia during their women’s singles first round match on Day Two of the 2014 US Open. Photograph: Streeter Lecka/Getty Images

Fifteen-year-old American wild card Cici Bellis stunned Australian Open finalist Dominika Cibulkova in the biggest upset of the US Open so far. Bellis(...)