Serena Williams of the U.S. hits a return to Kiki Bertens of the Netherlands during their second round match at the U.S. Open Championships tennis tournament in New York. Adrees Latif/Reuters

If this were a fight, it might have been called off before a blow had been landed. But Kiki Bertens, a smiling, 23-year-old Dutch qualifier who looked(...)

Serena Williams of the U.S. and Vitalia Diatchenko of Russia talk after Diatchenko retired from their match during the U.S. Open tennis tournament at Arthur Ashe Stadium in New York. Diatchenko appeared severely hobbled from the start, unable to move well, and retired in the second set. Photo: Todd Heisler/The New York Times

Serena Williams, as befits the grand dame of tennis, began the pursuit of a calendar grand slam with a regal swat on the first evening of the 2015 US (...)

Serena Williams’ Australian Open victory was her 19th singles title. Photo: Juan Medina/Reuters

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, accordin(...)

Serena Williams poses with the Daphne Akhurst Memorial Cup after winning the women’s singles final at the 2015 Australian Open in Melbourne. Photograph: Reuters.

Serena Williams made her professional debut on a practice court at Club Avantage in Quebec City on October 29, 1995. With an estimated 50 people on ha(...)

Angelique Kerber of Germany celebrates during her  fourth-round match against Maria Sharapova of Russia at Wimbledon. Photograph: Al Bello/Getty Images

Oh. I. Say. Now Maria Sharapova, the favourite, is gone, too. In a women’s competition distinguished by shock results – with incredulity only fraction(...)

Roger Federer of Switzerland throws his sweatband into the crowd as he celebrates victory in his men’s singles match against Lukas Lacko of Slovakia on day one of the French Open at Roland Garros, Paris. Photograph: Getty Images

If Roger Federer’s new appellation, “Swiss number two and father of four”, suggests Superman has abandoned his cape and tights for a life of domest(...)

Serena Williams talks to the media during previews for Wimbledon. She attempted to defuse the reported conflcit between herself and world number two Mara Sharapova. Photograph: Jon Buckle-Pool/Getty Images.

Serena Williams thought she had put the lid on the prospect of a Wimbledon feud with Maria Sharapova when they held face-to-face talks at the pre-tour(...)